68619904 has 32 divisors (see below), whose sum is σ = 140408100. Its totient is φ = 33380352.

The previous prime is 68619883. The next prime is 68619907. The reversal of 68619904 is 40991686.

It can be written as a sum of positive squares in 2 ways, for example, as 68558400 + 61504 = 8280^2 + 248^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (68619907) 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, 2509 + ... + 11980.

Almost surely, 2^68619904 is an apocalyptic number.

68619904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

68619904 is an abundant number, since it is smaller than the sum of its proper divisors (71788196).

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

68619904 is a wasteful number, since it uses less digits than its factorization.

68619904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14540 (or 14528 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 68619904 is about 8283.7131770722. The cubic root of 68619904 is about 409.4020711193.

The spelling of 68619904 in words is "sixty-eight million, six hundred nineteen thousand, nine hundred four".