79911810 has 96 divisors (see below), whose sum is σ = 231087168. Its totient is φ = 18994560.

The previous prime is 79911803. The next prime is 79911851. The reversal of 79911810 is 1811997.

It is a super-2 number, since 2×79911810² = 12771794754952200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51709 + ... + 53231.

It is an arithmetic number, because the mean of its divisors is an integer number (2407158).

Almost surely, 2^79911810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79911810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115543584).

79911810 is an abundant number, since it is smaller than the sum of its proper divisors (151175358).

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

79911810 is a wasteful number, since it uses less digits than its factorization.

79911810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600 (or 1597 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

The square root of 79911810 is about 8939.3405797072. The cubic root of 79911810 is about 430.7285467938.

It can be divided in two parts, 7991 and 1810, that added together give a square (9801 = 99²).

The spelling of 79911810 in words is "seventy-nine million, nine hundred eleven thousand, eight hundred ten".