68736904 has 16 divisors (see below), whose sum is σ = 128969820. Its totient is φ = 34344960.

The previous prime is 68736893. The next prime is 68736911. The reversal of 68736904 is 40963786.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67732900 + 1004004 = 8230^2 + 1002^2 .

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, 20464 + ... + 23584.

Almost surely, 2^68736904 is an apocalyptic number.

It is an amenable number.

68736904 is a deficient number, since it is larger than the sum of its proper divisors (60232916).

68736904 is a wasteful number, since it uses less digits than its factorization.

68736904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5880 (or 5876 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 68736904 is about 8290.7722197634. The cubic root of 68736904 is about 409.6346219361.

The spelling of 68736904 in words is "sixty-eight million, seven hundred thirty-six thousand, nine hundred four".