79577856 has 144 divisors (see below), whose sum is σ = 244053600. Its totient is φ = 25546752.

The previous prime is 79577807. The next prime is 79577863. The reversal of 79577856 is 65877597.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200250 + ... + 200646.

Almost surely, 2^79577856 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 79577856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122026800).

79577856 is an abundant number, since it is smaller than the sum of its proper divisors (164475744).

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

79577856 is a wasteful number, since it uses less digits than its factorization.

79577856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 431 counting only the distinct ones).

The product of its digits is 3704400, while the sum is 54.

The square root of 79577856 is about 8920.6421293537. The cubic root of 79577856 is about 430.1276995883.

The spelling of 79577856 in words is "seventy-nine million, five hundred seventy-seven thousand, eight hundred fifty-six".