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38869991664 = 2437216526357
BaseRepresentation
bin100100001100110101…
…010000000011110000
310201022220202011110220
4210030311100003300
51114101204213124
625505010453040
72544143322600
oct441465200360
9121286664426
1038869991664
1115537108059
127649594180
133885c25b8a
141c4a49ac00
1510276c4879
hex90cd500f0

38869991664 has 60 divisors (see below), whose sum is σ = 116808298344. Its totient is φ = 11105711232.

The previous prime is 38869991663. The next prime is 38869991681. The reversal of 38869991664 is 46619996883.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38869991663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8260827 + ... + 8265530.

Almost surely, 238869991664 is an apocalyptic number.

It is an amenable number.

38869991664 is an abundant number, since it is smaller than the sum of its proper divisors (77938306680).

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

38869991664 is a wasteful number, since it uses less digits than its factorization.

38869991664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16526382 (or 16526369 counting only the distinct ones).

The product of its digits is 120932352, while the sum is 69.

The spelling of 38869991664 in words is "thirty-eight billion, eight hundred sixty-nine million, nine hundred ninety-one thousand, six hundred sixty-four".

Divisors: 1 2 3 4 6 7 8 12 14 16 21 24 28 42 48 49 56 84 98 112 147 168 196 294 336 392 588 784 1176 2352 16526357 33052714 49579071 66105428 99158142 115684499 132210856 198316284 231368998 264421712 347053497 396632568 462737996 694106994 793265136 809791493 925475992 1388213988 1619582986 1850951984 2429374479 2776427976 3239165972 4858748958 5552855952 6478331944 9717497916 12956663888 19434995832 38869991664