18379872 has 120 divisors (see below), whose sum is σ = 61837776. Its totient is φ = 5246208.

The previous prime is 18379847. The next prime is 18379891. The reversal of 18379872 is 27897381.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17638 + ... + 18650.

Almost surely, 2^18379872 is an apocalyptic number.

18379872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18379872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30918888).

18379872 is an abundant number, since it is smaller than the sum of its proper divisors (43457904).

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

18379872 is a wasteful number, since it uses less digits than its factorization.

18379872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042 (or 1025 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 18379872 is about 4287.1752938269. The cubic root of 18379872 is about 263.9049244418.

The spelling of 18379872 in words is "eighteen million, three hundred seventy-nine thousand, eight hundred seventy-two".