79311940 has 24 divisors (see below), whose sum is σ = 166786200. Its totient is φ = 31680768.

The previous prime is 79311929. The next prime is 79311949. The reversal of 79311940 is 4911397.

It can be written as a sum of positive squares in 4 ways, for example, as 10355524 + 68956416 = 3218^2 + 8304^2 .

It is a junction number, because it is equal to n+sod(n) for n = 79311896 and 79311905.

It is not an unprimeable number, because it can be changed into a prime (79311949) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14736 + ... + 19384.

It is an arithmetic number, because the mean of its divisors is an integer number (6949425).

Almost surely, 2^79311940 is an apocalyptic number.

It is an amenable number.

79311940 is an abundant number, since it is smaller than the sum of its proper divisors (87474260).

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

79311940 is a wasteful number, since it uses less digits than its factorization.

79311940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5511 (or 5509 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 79311940 is about 8905.7251248846. The cubic root of 79311940 is about 429.6480624918.

The spelling of 79311940 in words is "seventy-nine million, three hundred eleven thousand, nine hundred forty".