18938088 has 48 divisors (see below), whose sum is σ = 55238820. Its totient is φ = 5826816.

The previous prime is 18938083. The next prime is 18938093. The reversal of 18938088 is 88083981.

It is an interprime number because it is at equal distance from previous prime (18938083) and next prime (18938093).

It can be written as a sum of positive squares in 2 ways, for example, as 18301284 + 636804 = 4278^2 + 798^2 .

It is not an unprimeable number, because it can be changed into a prime (18938081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9181 + ... + 11052.

Almost surely, 2^18938088 is an apocalyptic number.

18938088 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18938088 is an abundant number, since it is smaller than the sum of its proper divisors (36300732).

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

18938088 is a wasteful number, since it uses less digits than its factorization.

18938088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20258 (or 20251 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 18938088 is about 4351.7913552927. The cubic root of 18938088 is about 266.5500142560.

The spelling of 18938088 in words is "eighteen million, nine hundred thirty-eight thousand, eighty-eight".