79000040 has 32 divisors (see below), whose sum is σ = 203143680. Its totient is φ = 27085632.

The previous prime is 79000021. The next prime is 79000087. The reversal of 79000040 is 4000097.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 78999976 and 79000021.

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, 140792 + ... + 141351.

It is an arithmetic number, because the mean of its divisors is an integer number (6348240).

Almost surely, 2^79000040 is an apocalyptic number.

79000040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

79000040 is an abundant number, since it is smaller than the sum of its proper divisors (124143640).

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

79000040 is a wasteful number, since it uses less digits than its factorization.

79000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282161 (or 282157 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 79000040 is about 8888.1966674911. The cubic root of 79000040 is about 429.0841151219.

The spelling of 79000040 in words is "seventy-nine million, forty", and thus it is an aban number and an uban number.