79993140 has 24 divisors (see below), whose sum is σ = 223980960. Its totient is φ = 21331488.

The previous prime is 79993129. The next prime is 79993187. The reversal of 79993140 is 4139997.

It is a junction number, because it is equal to n+sod(n) for n = 79993092 and 79993101.

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 7 ways as a sum of consecutive naturals, for example, 666550 + ... + 666669.

It is an arithmetic number, because the mean of its divisors is an integer number (9332540).

Almost surely, 2^79993140 is an apocalyptic number.

It is an amenable number.

79993140 is an abundant number, since it is smaller than the sum of its proper divisors (143987820).

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

79993140 is a wasteful number, since it uses less digits than its factorization.

79993140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333231 (or 1333229 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 79993140 is about 8943.8884161197. Note that the first 3 decimals coincide. The cubic root of 79993140 is about 430.8746214693.

It can be divided in two parts, 799 and 93140, that added together give a palindrome (93939).

The spelling of 79993140 in words is "seventy-nine million, nine hundred ninety-three thousand, one hundred forty".