79040020 has 48 divisors (see below), whose sum is σ = 172307520. Its totient is φ = 30433536.

The previous prime is 79040009. The next prime is 79040069. The reversal of 79040020 is 2004097.

It is a junction number, because it is equal to n+sod(n) for n = 79039973 and 79040000.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 62151 + ... + 63409.

It is an arithmetic number, because the mean of its divisors is an integer number (3589740).

Almost surely, 2^79040020 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 79040020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86153760).

79040020 is an abundant number, since it is smaller than the sum of its proper divisors (93267500).

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

79040020 is a wasteful number, since it uses less digits than its factorization.

79040020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384 (or 1382 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 79040020 is about 8890.4454331603. The cubic root of 79040020 is about 429.1564859285.

The spelling of 79040020 in words is "seventy-nine million, forty thousand, twenty".