68657880 has 64 divisors (see below), whose sum is σ = 206519040. Its totient is φ = 18260352.

The previous prime is 68657867. The next prime is 68657933. The reversal of 68657880 is 8875686.

It is a happy number.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86847 + ... + 87633.

It is an arithmetic number, because the mean of its divisors is an integer number (3226860).

Almost surely, 2^68657880 is an apocalyptic number.

68657880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68657880 is an abundant number, since it is smaller than the sum of its proper divisors (137861160).

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

68657880 is a wasteful number, since it uses less digits than its factorization.

68657880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528 (or 1524 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 68657880 is about 8286.0050687892. The cubic root of 68657880 is about 409.4775816972.

The spelling of 68657880 in words is "sixty-eight million, six hundred fifty-seven thousand, eight hundred eighty".