79085520 has 60 divisors (see below), whose sum is σ = 265597956. Its totient is φ = 21089280.

The previous prime is 79085509. The next prime is 79085521. The reversal of 79085520 is 2558097.

It can be written as a sum of positive squares in 2 ways, for example, as 54997056 + 24088464 = 7416^2 + 4908^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79085521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54201 + ... + 55640.

Almost surely, 2^79085520 is an apocalyptic number.

It is an amenable number.

79085520 is an abundant number, since it is smaller than the sum of its proper divisors (186512436).

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

79085520 is a wasteful number, since it uses less digits than its factorization.

79085520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109860 (or 109851 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 79085520 is about 8893.0039919028. The cubic root of 79085520 is about 429.2388192175.

The spelling of 79085520 in words is "seventy-nine million, eighty-five thousand, five hundred twenty".