79157220 has 48 divisors (see below), whose sum is σ = 223133568. Its totient is φ = 20966400.

The previous prime is 79157123. The next prime is 79157231. The reversal of 79157220 is 2275197.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4692 + ... + 13428.

It is an arithmetic number, because the mean of its divisors is an integer number (4648616).

Almost surely, 2^79157220 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 79157220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111566784).

79157220 is an abundant number, since it is smaller than the sum of its proper divisors (143976348).

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

79157220 is a wasteful number, since it uses less digits than its factorization.

79157220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8900 (or 8898 counting only the distinct ones).

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

The square root of 79157220 is about 8897.0343373508. The cubic root of 79157220 is about 429.3684979385.

The spelling of 79157220 in words is "seventy-nine million, one hundred fifty-seven thousand, two hundred twenty".