79979442 has 32 divisors (see below), whose sum is σ = 167239680. Its totient is φ = 25468560.

The previous prime is 79979437. The next prime is 79979447. The reversal of 79979442 is 24497997.

It is an interprime number because it is at equal distance from previous prime (79979437) and next prime (79979447).

It is a super-2 number, since 2×79979442² = 12793422285262728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79979447) 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, 11973 + ... + 17415.

It is an arithmetic number, because the mean of its divisors is an integer number (5226240).

Almost surely, 2^79979442 is an apocalyptic number.

79979442 is an abundant number, since it is smaller than the sum of its proper divisors (87260238).

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

79979442 is a wasteful number, since it uses less digits than its factorization.

79979442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5558.

The product of its digits is 1143072, while the sum is 51.

The square root of 79979442 is about 8943.1226090220. The cubic root of 79979442 is about 430.8500257874.

The spelling of 79979442 in words is "seventy-nine million, nine hundred seventy-nine thousand, four hundred forty-two".