68816904 has 64 divisors (see below), whose sum is σ = 186090240. Its totient is φ = 21081600.

The previous prime is 68816903. The next prime is 68816933. The reversal of 68816904 is 40961886.

It is a super-2 number, since 2×68816904² = 9471532552290432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68816903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114204 + ... + 114804.

It is an arithmetic number, because the mean of its divisors is an integer number (2907660).

Almost surely, 2^68816904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68816904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93045120).

68816904 is an abundant number, since it is smaller than the sum of its proper divisors (117273336).

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

68816904 is a wasteful number, since it uses less digits than its factorization.

68816904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 986 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 68816904 is about 8295.5954578318. The cubic root of 68816904 is about 409.7934791756.

The spelling of 68816904 in words is "sixty-eight million, eight hundred sixteen thousand, nine hundred four".