68609904 has 60 divisors (see below), whose sum is σ = 194836488. Its totient is φ = 20789120.

The previous prime is 68609899. The next prime is 68609921. The reversal of 68609904 is 40990686.

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 11 ways as a sum of consecutive naturals, for example, 99 + ... + 11714.

Almost surely, 2^68609904 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 68609904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97418244).

68609904 is an abundant number, since it is smaller than the sum of its proper divisors (126226584).

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

68609904 is a wasteful number, since it uses less digits than its factorization.

68609904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11846 (or 11829 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 68609904 is about 8283.1095610284. The cubic root of 68609904 is about 409.3821827227.

The spelling of 68609904 in words is "sixty-eight million, six hundred nine thousand, nine hundred four".