68685904 has 20 divisors (see below), whose sum is σ = 152090464. Its totient is φ = 29436768.

The previous prime is 68685811. The next prime is 68685907. The reversal of 68685904 is 40958686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68685907) 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, 306522 + ... + 306745.

Almost surely, 2^68685904 is an apocalyptic number.

It is an amenable number.

68685904 is an abundant number, since it is smaller than the sum of its proper divisors (83404560).

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

68685904 is a wasteful number, since it uses less digits than its factorization.

68685904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613282 (or 613276 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 68685904 is about 8287.6959403685. The cubic root of 68685904 is about 409.5332861011.

The spelling of 68685904 in words is "sixty-eight million, six hundred eighty-five thousand, nine hundred four".