79400020 has 24 divisors (see below), whose sum is σ = 190560384. Its totient is φ = 27222816.

The previous prime is 79400011. The next prime is 79400023. The reversal of 79400020 is 2000497.

It is a junction number, because it is equal to n+sod(n) for n = 79399964 and 79400000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79400023) 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, 283432 + ... + 283711.

It is an arithmetic number, because the mean of its divisors is an integer number (7940016).

Almost surely, 2^79400020 is an apocalyptic number.

79400020 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

79400020 is an abundant number, since it is smaller than the sum of its proper divisors (111160364).

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

79400020 is a wasteful number, since it uses less digits than its factorization.

79400020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567159 (or 567157 counting only the distinct ones).

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

The square root of 79400020 is about 8910.6688862285. The cubic root of 79400020 is about 429.8070524285.

The spelling of 79400020 in words is "seventy-nine million, four hundred thousand, twenty".