18280432 has 20 divisors (see below), whose sum is σ = 37283080. Its totient is φ = 8659008.

The previous prime is 18280429. The next prime is 18280447. The reversal of 18280432 is 23408281.

It is a self number, because there is not a number n which added to its sum of digits gives 18280432.

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, 29763 + ... + 30370.

It is an arithmetic number, because the mean of its divisors is an integer number (1864154).

Almost surely, 2^18280432 is an apocalyptic number.

It is an amenable number.

18280432 is an abundant number, since it is smaller than the sum of its proper divisors (19002648).

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

18280432 is a wasteful number, since it uses less digits than its factorization.

18280432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60160 (or 60154 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 18280432 is about 4275.5621852570. The cubic root of 18280432 is about 263.4281315833.

The spelling of 18280432 in words is "eighteen million, two hundred eighty thousand, four hundred thirty-two".