18485238 has 64 divisors (see below), whose sum is σ = 41472000. Its totient is φ = 5470080.

The previous prime is 18485191. The next prime is 18485249. The reversal of 18485238 is 83258481.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18485196 and 18485205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123988 + ... + 124136.

It is an arithmetic number, because the mean of its divisors is an integer number (648000).

Almost surely, 2^18485238 is an apocalyptic number.

18485238 is an abundant number, since it is smaller than the sum of its proper divisors (22986762).

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

18485238 is a wasteful number, since it uses less digits than its factorization.

18485238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237.

The product of its digits is 61440, while the sum is 39.

The square root of 18485238 is about 4299.4462434132. The cubic root of 18485238 is about 264.4082583670.

The spelling of 18485238 in words is "eighteen million, four hundred eighty-five thousand, two hundred thirty-eight".