68699904 has 144 divisors (see below), whose sum is σ = 225265152. Its totient is φ = 18100224.

The previous prime is 68699899. The next prime is 68699957. The reversal of 68699904 is 40999686.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69397 + ... + 70379.

Almost surely, 2^68699904 is an apocalyptic number.

68699904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68699904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112632576).

68699904 is an abundant number, since it is smaller than the sum of its proper divisors (156565248).

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

68699904 is a wasteful number, since it uses less digits than its factorization.

68699904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 68699904 is about 8288.5405229148. The cubic root of 68699904 is about 409.5611087749.

The spelling of 68699904 in words is "sixty-eight million, six hundred ninety-nine thousand, nine hundred four".