18589272 has 32 divisors (see below), whose sum is σ = 50048880. Its totient is φ = 5719680.

The previous prime is 18589237. The next prime is 18589283. The reversal of 18589272 is 27298581.

It is a super-2 number, since 2×18589272² = 691122066979968, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29479 + ... + 30102.

Almost surely, 2^18589272 is an apocalyptic number.

18589272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18589272 is an abundant number, since it is smaller than the sum of its proper divisors (31459608).

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

18589272 is a wasteful number, since it uses less digits than its factorization.

18589272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59603 (or 59599 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 18589272 is about 4311.5278034590. The cubic root of 18589272 is about 264.9033562387.

The spelling of 18589272 in words is "eighteen million, five hundred eighty-nine thousand, two hundred seventy-two".