79961904 has 200 divisors, whose sum is σ = 259269120. Its totient is φ = 23587200.

The previous prime is 79961891. The next prime is 79961923. The reversal of 79961904 is 40916997.

It is a self number, because there is not a number n which added to its sum of digits gives 79961904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1012137 + ... + 1012215.

Almost surely, 2^79961904 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 79961904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129634560).

79961904 is an abundant number, since it is smaller than the sum of its proper divisors (179307216).

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

79961904 is a wasteful number, since it uses less digits than its factorization.

79961904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 79961904 is about 8942.1420252644. The cubic root of 79961904 is about 430.8185310268.

The spelling of 79961904 in words is "seventy-nine million, nine hundred sixty-one thousand, nine hundred four".