18332238 has 8 divisors (see below), whose sum is σ = 36664488. Its totient is φ = 6110744.

The previous prime is 18332231. The next prime is 18332243. The reversal of 18332238 is 83223381.

It is a sphenic number, since it is the product of 3 distinct primes.

18332238 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18332231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1527681 + ... + 1527692.

It is an arithmetic number, because the mean of its divisors is an integer number (4583061).

Almost surely, 2^18332238 is an apocalyptic number.

18332238 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18332238 is a wasteful number, since it uses less digits than its factorization.

18332238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3055378.

The product of its digits is 6912, while the sum is 30.

The square root of 18332238 is about 4281.6162836013. The cubic root of 18332238 is about 263.6767450773.

The spelling of 18332238 in words is "eighteen million, three hundred thirty-two thousand, two hundred thirty-eight".