68931256 has 8 divisors (see below), whose sum is σ = 129246120. Its totient is φ = 34465624.

The previous prime is 68931229. The next prime is 68931257. The reversal of 68931256 is 65213986.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68931257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4308196 + ... + 4308211.

It is an arithmetic number, because the mean of its divisors is an integer number (16155765).

Almost surely, 2^68931256 is an apocalyptic number.

It is an amenable number.

68931256 is a deficient number, since it is larger than the sum of its proper divisors (60314864).

68931256 is a wasteful number, since it uses less digits than its factorization.

68931256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8616413 (or 8616409 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 68931256 is about 8302.4849292245. The cubic root of 68931256 is about 410.0203360922.

The spelling of 68931256 in words is "sixty-eight million, nine hundred thirty-one thousand, two hundred fifty-six".