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38870697693942 = 23319291677822769
BaseRepresentation
bin10001101011010010010100…
…01000001101001011110110
312002122000001202101212101000
420311221022020031023312
520043324142102201232
6214400541344344130
711121213060605322
oct1065511210151366
9162560052355330
1038870697693942
1111426a74544914
12443949a015046
13188c64cb39c6a
149854cd500982
154761b1a0b27c
hex235a4a20d2f6

38870697693942 has 128 divisors (see below), whose sum is σ = 94624225920000. Its totient is φ = 11780713115136.

The previous prime is 38870697693889. The next prime is 38870697693943. The reversal of 38870697693942 is 24939679607883.

38870697693942 is a `hidden beast` number, since 3 + 8 + 87 + 0 + 6 + 97 + 69 + 394 + 2 = 666.

It is a super-2 number, since 2×388706976939422 (a number of 28 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (81) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38870697693943) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1057534 + ... + 8880302.

It is an arithmetic number, because the mean of its divisors is an integer number (739251765000).

Almost surely, 238870697693942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38870697693942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47312112960000).

38870697693942 is an abundant number, since it is smaller than the sum of its proper divisors (55753528226058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38870697693942 is a wasteful number, since it uses less digits than its factorization.

38870697693942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7822995 (or 7822989 counting only the distinct ones).

The product of its (nonzero) digits is 5925685248, while the sum is 81.

The spelling of 38870697693942 in words is "thirty-eight trillion, eight hundred seventy billion, six hundred ninety-seven million, six hundred ninety-three thousand, nine hundred forty-two".

Divisors: 1 2 3 6 9 18 19 27 29 38 54 57 58 87 114 167 171 174 261 334 342 501 513 522 551 783 1002 1026 1102 1503 1566 1653 3006 3173 3306 4509 4843 4959 6346 9018 9519 9686 9918 14529 14877 19038 28557 29058 29754 43587 57114 85671 87174 92017 130761 171342 184034 261522 276051 552102 828153 1656306 2484459 4968918 7822769 15645538 23468307 46936614 70404921 140809842 148632611 211214763 226860301 297265222 422429526 445897833 453720602 680580903 891795666 1306402423 1337693499 1361161806 2041742709 2612804846 2675386998 3919207269 4013080497 4083485418 4310345719 6125228127 7838414538 8026160994 8620691438 11757621807 12250456254 12931037157 23515243614 24821646037 25862074314 35272865421 37885670267 38793111471 49643292074 70545730842 74464938111 75771340534 77586222942 113657010801 116379334413 148929876222 223394814333 227314021602 232758668826 340971032403 446789628666 670184442999 681942064806 719827735073 1022913097209 1340368885998 1439655470146 2045826194418 2159483205219 4318966410438 6478449615657 12956899231314 19435348846971 38870697693942