18879944 has 8 divisors (see below), whose sum is σ = 35399910. Its totient is φ = 9439968.

The previous prime is 18879919. The next prime is 18880007. The reversal of 18879944 is 44997881.

It can be written as a sum of positive squares in only one way, i.e., 18748900 + 131044 = 4330^2 + 362^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 18879892 and 18879901.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1179989 + ... + 1180004.

Almost surely, 2^18879944 is an apocalyptic number.

It is an amenable number.

18879944 is a deficient number, since it is larger than the sum of its proper divisors (16519966).

18879944 is a wasteful number, since it uses less digits than its factorization.

18879944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359999 (or 2359995 counting only the distinct ones).

The product of its digits is 580608, while the sum is 50.

The square root of 18879944 is about 4345.1057524530. The cubic root of 18879944 is about 266.2769459970.

The spelling of 18879944 in words is "eighteen million, eight hundred seventy-nine thousand, nine hundred forty-four".