68712688 has 20 divisors (see below), whose sum is σ = 145234008. Its totient is φ = 31232960.

The previous prime is 68712653. The next prime is 68712697. The reversal of 68712688 is 88621786.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195031 + ... + 195382.

Almost surely, 2^68712688 is an apocalyptic number.

It is an amenable number.

68712688 is an abundant number, since it is smaller than the sum of its proper divisors (76521320).

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

68712688 is a wasteful number, since it uses less digits than its factorization.

68712688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390432 (or 390426 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 68712688 is about 8289.3116722681. The cubic root of 68712688 is about 409.5865115492.

It can be divided in two parts, 6871 and 2688, that added together give a palindrome (9559).

The spelling of 68712688 in words is "sixty-eight million, seven hundred twelve thousand, six hundred eighty-eight".