18038244 has 24 divisors (see below), whose sum is σ = 48102208. Its totient is φ = 5153760.

The previous prime is 18038243. The next prime is 18038257. The reversal of 18038244 is 44283081.

It is not an unprimeable number, because it can be changed into a prime (18038243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107287 + ... + 107454.

Almost surely, 2^18038244 is an apocalyptic number.

18038244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18038244 is an abundant number, since it is smaller than the sum of its proper divisors (30063964).

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

18038244 is a wasteful number, since it uses less digits than its factorization.

18038244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214755 (or 214753 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 18038244 is about 4247.1453942619. The cubic root of 18038244 is about 262.2596148544.

The spelling of 18038244 in words is "eighteen million, thirty-eight thousand, two hundred forty-four".