79642818 has 32 divisors (see below), whose sum is σ = 177292800. Its totient is φ = 26501328.

The previous prime is 79642817. The next prime is 79642853. The reversal of 79642818 is 81824697.

It is a super-2 number, since 2×79642818² = 12685956917962248, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (79642811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45748 + ... + 47456.

It is an arithmetic number, because the mean of its divisors is an integer number (5540400).

Almost surely, 2^79642818 is an apocalyptic number.

79642818 is an abundant number, since it is smaller than the sum of its proper divisors (97649982).

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

79642818 is a wasteful number, since it uses less digits than its factorization.

79642818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583 (or 2577 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 79642818 is about 8924.2824921671. The cubic root of 79642818 is about 430.2447101788.

The spelling of 79642818 in words is "seventy-nine million, six hundred forty-two thousand, eight hundred eighteen".