79306140 has 24 divisors (see below), whose sum is σ = 222057360. Its totient is φ = 21148288.

The previous prime is 79306127. The next prime is 79306169. The reversal of 79306140 is 4160397.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 79306098 and 79306107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 660825 + ... + 660944.

It is an arithmetic number, because the mean of its divisors is an integer number (9252390).

Almost surely, 2^79306140 is an apocalyptic number.

It is an amenable number.

79306140 is an abundant number, since it is smaller than the sum of its proper divisors (142751220).

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

79306140 is a wasteful number, since it uses less digits than its factorization.

79306140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321781 (or 1321779 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 79306140 is about 8905.3994857053. The cubic root of 79306140 is about 429.6375889972.

The spelling of 79306140 in words is "seventy-nine million, three hundred six thousand, one hundred forty".