68680904 has 16 divisors (see below), whose sum is σ = 131918220. Its totient is φ = 33502720.

The previous prime is 68680889. The next prime is 68680907. The reversal of 68680904 is 40908686.

It can be written as a sum of positive squares in 2 ways, for example, as 65448100 + 3232804 = 8090^2 + 1798^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (68680907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104369 + ... + 105024.

Almost surely, 2^68680904 is an apocalyptic number.

It is an amenable number.

68680904 is a deficient number, since it is larger than the sum of its proper divisors (63237316).

68680904 is a wasteful number, since it uses less digits than its factorization.

68680904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209440 (or 209436 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 68680904 is about 8287.3942828853. The cubic root of 68680904 is about 409.5233485156.

The spelling of 68680904 in words is "sixty-eight million, six hundred eighty thousand, nine hundred four".