68904590 has 16 divisors (see below), whose sum is σ = 125599680. Its totient is φ = 27212640.

The previous prime is 68904571. The next prime is 68904607. The reversal of 68904590 is 9540986.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42821 + ... + 44400.

It is an arithmetic number, because the mean of its divisors is an integer number (7849980).

Almost surely, 2^68904590 is an apocalyptic number.

68904590 is a deficient number, since it is larger than the sum of its proper divisors (56695090).

68904590 is a wasteful number, since it uses less digits than its factorization.

68904590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87307.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 68904590 is about 8300.8788691319. The cubic root of 68904590 is about 409.9674572624.

The spelling of 68904590 in words is "sixty-eight million, nine hundred four thousand, five hundred ninety".