18256232 has 32 divisors (see below), whose sum is σ = 36459720. Its totient is φ = 8540160.

The previous prime is 18256229. The next prime is 18256237. The reversal of 18256232 is 23265281.

It can be written as a sum of positive squares in 4 ways, for example, as 16048036 + 2208196 = 4006^2 + 1486^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18256195 and 18256204.

It is not an unprimeable number, because it can be changed into a prime (18256237) 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, 32498 + ... + 33054.

Almost surely, 2^18256232 is an apocalyptic number.

It is an amenable number.

18256232 is a deficient number, since it is larger than the sum of its proper divisors (18203488).

18256232 is a wasteful number, since it uses less digits than its factorization.

18256232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821 (or 817 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 18256232 is about 4272.7312108299. The cubic root of 18256232 is about 263.3118364477.

The spelling of 18256232 in words is "eighteen million, two hundred fifty-six thousand, two hundred thirty-two".