79977808 has 40 divisors (see below), whose sum is σ = 164025216. Its totient is φ = 37699200.

The previous prime is 79977773. The next prime is 79977817. The reversal of 79977808 is 80877997.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 24598 + ... + 27658.

Almost surely, 2^79977808 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 79977808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82012608).

79977808 is an abundant number, since it is smaller than the sum of its proper divisors (84047408).

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

79977808 is a wasteful number, since it uses less digits than its factorization.

79977808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163 (or 3157 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 55.

The square root of 79977808 is about 8943.0312534397. The cubic root of 79977808 is about 430.8470916428.

The spelling of 79977808 in words is "seventy-nine million, nine hundred seventy-seven thousand, eight hundred eight".