79390540 has 12 divisors (see below), whose sum is σ = 166720176. Its totient is φ = 31756208.

The previous prime is 79390537. The next prime is 79390543. The reversal of 79390540 is 4509397.

It is an interprime number because it is at equal distance from previous prime (79390537) and next prime (79390543).

It is a self number, because there is not a number n which added to its sum of digits gives 79390540.

It is not an unprimeable number, because it can be changed into a prime (79390543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1984744 + ... + 1984783.

It is an arithmetic number, because the mean of its divisors is an integer number (13893348).

Almost surely, 2^79390540 is an apocalyptic number.

It is an amenable number.

79390540 is an abundant number, since it is smaller than the sum of its proper divisors (87329636).

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

79390540 is a wasteful number, since it uses less digits than its factorization.

79390540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3969536 (or 3969534 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 79390540 is about 8910.1369237515. The cubic root of 79390540 is about 429.7899460809.

The spelling of 79390540 in words is "seventy-nine million, three hundred ninety thousand, five hundred forty".