79039040 has 56 divisors (see below), whose sum is σ = 196413120. Its totient is φ = 30238208.

The previous prime is 79039039. The next prime is 79039043. The reversal of 79039040 is 4093097.

It is a happy number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 79038988 and 79039006.

It is not an unprimeable number, because it can be changed into a prime (79039043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1991 + ... + 12729.

Almost surely, 2^79039040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79039040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98206560).

79039040 is an abundant number, since it is smaller than the sum of its proper divisors (117374080).

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

79039040 is a wasteful number, since it uses less digits than its factorization.

79039040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10779 (or 10769 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 79039040 is about 8890.3903176407. The cubic root of 79039040 is about 429.1547122486.

The spelling of 79039040 in words is "seventy-nine million, thirty-nine thousand, forty".