18397232 has 40 divisors (see below), whose sum is σ = 40952736. Its totient is φ = 7842816.

The previous prime is 18397231. The next prime is 18397237. The reversal of 18397232 is 23279381.

It is a junction number, because it is equal to n+sod(n) for n = 18397192 and 18397201.

It is not an unprimeable number, because it can be changed into a prime (18397231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30728 + ... + 31320.

Almost surely, 2^18397232 is an apocalyptic number.

It is an amenable number.

18397232 is an abundant number, since it is smaller than the sum of its proper divisors (22555504).

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

18397232 is a wasteful number, since it uses less digits than its factorization.

18397232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 879 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 18397232 is about 4289.1994591066. The cubic root of 18397232 is about 263.9879853730.

The spelling of 18397232 in words is "eighteen million, three hundred ninety-seven thousand, two hundred thirty-two".