79809144 has 16 divisors (see below), whose sum is σ = 199522920. Its totient is φ = 26603040.

The previous prime is 79809137. The next prime is 79809173. The reversal of 79809144 is 44190897.

It is a junction number, because it is equal to n+sod(n) for n = 79809096 and 79809105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662667 + ... + 1662714.

Almost surely, 2^79809144 is an apocalyptic number.

It is an amenable number.

79809144 is an abundant number, since it is smaller than the sum of its proper divisors (119713776).

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

79809144 is a wasteful number, since it uses less digits than its factorization.

79809144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325390 (or 3325386 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 79809144 is about 8933.5963642869. The cubic root of 79809144 is about 430.5440094974.

The spelling of 79809144 in words is "seventy-nine million, eight hundred nine thousand, one hundred forty-four".