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258051960 = 23335613917
BaseRepresentation
bin11110110000110…
…00111101111000
3122222120101202000
433120120331320
51012030130320
641334541000
76252256035
oct1730307570
9588511660
10258051960
11122733291
1272507760
134160168a
14263b438c
15179c4c90
hexf618f78

258051960 has 128 divisors (see below), whose sum is σ = 874497600. Its totient is φ = 67668480.

The previous prime is 258051953. The next prime is 258051961. The reversal of 258051960 is 69150852.

It is a happy number.

258051960 is a `hidden beast` number, since 2 + 5 + 80 + 519 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258051961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63922 + ... + 67838.

Almost surely, 2258051960 is an apocalyptic number.

258051960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 258051960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437248800).

258051960 is an abundant number, since it is smaller than the sum of its proper divisors (616445640).

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

258051960 is a wasteful number, since it uses less digits than its factorization.

258051960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3998 (or 3988 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 258051960 is about 16063.9957669317. The cubic root of 258051960 is about 636.6524099156.

The spelling of 258051960 in words is "two hundred fifty-eight million, fifty-one thousand, nine hundred sixty".

Divisors: 1 2 3 4 5 6 8 9 10 12 15 18 20 24 27 30 36 40 45 54 60 61 72 90 108 120 122 135 180 183 216 244 270 305 360 366 488 540 549 610 732 915 1080 1098 1220 1464 1647 1830 2196 2440 2745 3294 3660 3917 4392 5490 6588 7320 7834 8235 10980 11751 13176 15668 16470 19585 21960 23502 31336 32940 35253 39170 47004 58755 65880 70506 78340 94008 105759 117510 141012 156680 176265 211518 235020 238937 282024 352530 423036 470040 477874 528795 705060 716811 846072 955748 1057590 1194685 1410120 1433622 1911496 2115180 2150433 2389370 2867244 3584055 4230360 4300866 4778740 5734488 6451299 7168110 8601732 9557480 10752165 12902598 14336220 17203464 21504330 25805196 28672440 32256495 43008660 51610392 64512990 86017320 129025980 258051960