18638230 has 32 divisors (see below), whose sum is σ = 36324288. Its totient is φ = 6844800.

The previous prime is 18638227. The next prime is 18638251. The reversal of 18638230 is 3283681.

18638230 = 573² + 574² + ... + 624².

It is a junction number, because it is equal to n+sod(n) for n = 18638192 and 18638201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40200 + ... + 40660.

It is an arithmetic number, because the mean of its divisors is an integer number (1135134).

Almost surely, 2^18638230 is an apocalyptic number.

18638230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18638230 is a deficient number, since it is larger than the sum of its proper divisors (17686058).

18638230 is a wasteful number, since it uses less digits than its factorization.

18638230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 18638230 is about 4317.2016399515. The cubic root of 18638230 is about 265.1357083478.

It can be divided in two parts, 186 and 38230, that added together give a 4-th power (38416 = 14⁴).

The spelling of 18638230 in words is "eighteen million, six hundred thirty-eight thousand, two hundred thirty".