68681256 has 32 divisors (see below), whose sum is σ = 196232640. Its totient is φ = 19623168.

The previous prime is 68681233. The next prime is 68681279. The reversal of 68681256 is 65218686.

It is an interprime number because it is at equal distance from previous prime (68681233) and next prime (68681279).

It is a super-3 number, since 3×68681256³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204241 + ... + 204576.

It is an arithmetic number, because the mean of its divisors is an integer number (6132270).

Almost surely, 2^68681256 is an apocalyptic number.

It is an amenable number.

68681256 is an abundant number, since it is smaller than the sum of its proper divisors (127551384).

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

68681256 is a wasteful number, since it uses less digits than its factorization.

68681256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408833 (or 408829 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 68681256 is about 8287.4155199314. The cubic root of 68681256 is about 409.5240481374.

The spelling of 68681256 in words is "sixty-eight million, six hundred eighty-one thousand, two hundred fifty-six".