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68713944 = 233131131949
BaseRepresentation
bin1000001100001…
…11110111011000
311210022000210220
410012013313120
5120042321234
610452440040
71463026125
oct406076730
9153260726
1068713944
1135872892
121b019020
131130b350
1491a974c
156074a49
hex4187dd8

68713944 has 64 divisors (see below), whose sum is σ = 186732000. Its totient is φ = 20944896.

The previous prime is 68713933. The next prime is 68713961. The reversal of 68713944 is 44931786.

It is a super-2 number, since 2×687139442 = 9443212200070272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68713896 and 68713905.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 34282 + ... + 36230.

Almost surely, 268713944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68713944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93366000).

68713944 is an abundant number, since it is smaller than the sum of its proper divisors (118018056).

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

68713944 is a wasteful number, since it uses less digits than its factorization.

68713944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084 (or 2080 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 68713944 is about 8289.3874321327. The cubic root of 68713944 is about 409.5890071462.

The spelling of 68713944 in words is "sixty-eight million, seven hundred thirteen thousand, nine hundred forty-four".

Divisors: 1 2 3 4 6 8 12 13 24 26 39 52 78 104 113 156 226 312 339 452 678 904 1356 1469 1949 2712 2938 3898 4407 5847 5876 7796 8814 11694 11752 15592 17628 23388 25337 35256 46776 50674 76011 101348 152022 202696 220237 304044 440474 608088 660711 880948 1321422 1761896 2642844 2863081 5285688 5726162 8589243 11452324 17178486 22904648 34356972 68713944