79172520 has 64 divisors (see below), whose sum is σ = 271451520. Its totient is φ = 18096384.

The previous prime is 79172507. The next prime is 79172567. The reversal of 79172520 is 2527197.

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 15 ways as a sum of consecutive naturals, for example, 46287 + ... + 47966.

It is an arithmetic number, because the mean of its divisors is an integer number (4241430).

Almost surely, 2^79172520 is an apocalyptic number.

79172520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

79172520 is an abundant number, since it is smaller than the sum of its proper divisors (192279000).

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

79172520 is a wasteful number, since it uses less digits than its factorization.

79172520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94274 (or 94270 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 79172520 is about 8897.8941328834. The cubic root of 79172520 is about 429.3961598280.

The spelling of 79172520 in words is "seventy-nine million, one hundred seventy-two thousand, five hundred twenty".