68904636 has 12 divisors (see below), whose sum is σ = 160777512. Its totient is φ = 22968208.

The previous prime is 68904613. The next prime is 68904637. The reversal of 68904636 is 63640986.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68904637) 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, 2871015 + ... + 2871038.

It is an arithmetic number, because the mean of its divisors is an integer number (13398126).

Almost surely, 2^68904636 is an apocalyptic number.

It is an amenable number.

68904636 is an abundant number, since it is smaller than the sum of its proper divisors (91872876).

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

68904636 is a wasteful number, since it uses less digits than its factorization.

68904636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5742060 (or 5742058 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 68904636 is about 8300.8816399224. The cubic root of 68904636 is about 409.9675484924.

The spelling of 68904636 in words is "sixty-eight million, nine hundred four thousand, six hundred thirty-six".