79913440 has 24 divisors (see below), whose sum is σ = 188795880. Its totient is φ = 31965312.

The previous prime is 79913423. The next prime is 79913441. The reversal of 79913440 is 4431997.

It is a self number, because there is not a number n which added to its sum of digits gives 79913440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79913441) 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 3 ways as a sum of consecutive naturals, for example, 249570 + ... + 249889.

It is an arithmetic number, because the mean of its divisors is an integer number (7866495).

Almost surely, 2^79913440 is an apocalyptic number.

It is an amenable number.

79913440 is an abundant number, since it is smaller than the sum of its proper divisors (108882440).

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

79913440 is a wasteful number, since it uses less digits than its factorization.

79913440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499474 (or 499466 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 79913440 is about 8939.4317492780. The cubic root of 79913440 is about 430.7314753671.

The spelling of 79913440 in words is "seventy-nine million, nine hundred thirteen thousand, four hundred forty".