79800042 has 32 divisors (see below), whose sum is σ = 183134592. Its totient is φ = 22708224.

The previous prime is 79800029. The next prime is 79800043. The reversal of 79800042 is 24000897.

It is a junction number, because it is equal to n+sod(n) for n = 79799982 and 79800009.

It is not an unprimeable number, because it can be changed into a prime (79800043) 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 15 ways as a sum of consecutive naturals, for example, 7098 + ... + 14490.

It is an arithmetic number, because the mean of its divisors is an integer number (5722956).

Almost surely, 2^79800042 is an apocalyptic number.

79800042 is an abundant number, since it is smaller than the sum of its proper divisors (103334550).

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

79800042 is a wasteful number, since it uses less digits than its factorization.

79800042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7662.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 79800042 is about 8933.0869244623. The cubic root of 79800042 is about 430.5276414458.

The spelling of 79800042 in words is "seventy-nine million, eight hundred thousand, forty-two".