18079944 has 64 divisors (see below), whose sum is σ = 49152000. Its totient is φ = 5520960.

The previous prime is 18079933. The next prime is 18079949. The reversal of 18079944 is 44997081.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18079896 and 18079905.

It is not an unprimeable number, because it can be changed into a prime (18079949) 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, 13497 + ... + 14775.

It is an arithmetic number, because the mean of its divisors is an integer number (768000).

Almost surely, 2^18079944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18079944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24576000).

18079944 is an abundant number, since it is smaller than the sum of its proper divisors (31072056).

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

18079944 is a wasteful number, since it uses less digits than its factorization.

18079944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338 (or 1334 counting only the distinct ones).

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

The square root of 18079944 is about 4252.0517400427. The cubic root of 18079944 is about 262.4615526457.

The spelling of 18079944 in words is "eighteen million, seventy-nine thousand, nine hundred forty-four".