79529440 has 48 divisors (see below), whose sum is σ = 197784720. Its totient is φ = 30136320.

The previous prime is 79529431. The next prime is 79529441. The reversal of 79529440 is 4492597.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 79529393 and 79529402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79529441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10041 + ... + 16120.

It is an arithmetic number, because the mean of its divisors is an integer number (4120515).

Almost surely, 2^79529440 is an apocalyptic number.

It is an amenable number.

79529440 is an abundant number, since it is smaller than the sum of its proper divisors (118255280).

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

79529440 is a wasteful number, since it uses less digits than its factorization.

79529440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26195 (or 26187 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 79529440 is about 8917.9280104742. The cubic root of 79529440 is about 430.0404504943.

The spelling of 79529440 in words is "seventy-nine million, five hundred twenty-nine thousand, four hundred forty".