79131520 has 64 divisors (see below), whose sum is σ = 203747040. Its totient is φ = 29214720.

The previous prime is 79131509. The next prime is 79131539. The reversal of 79131520 is 2513197.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3565 + ... + 13075.

Almost surely, 2^79131520 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 79131520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101873520).

79131520 is an abundant number, since it is smaller than the sum of its proper divisors (124615520).

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

79131520 is a wasteful number, since it uses less digits than its factorization.

79131520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9543 (or 9531 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 79131520 is about 8895.5899186057. The cubic root of 79131520 is about 429.3220251727.

The spelling of 79131520 in words is "seventy-nine million, one hundred thirty-one thousand, five hundred twenty".