18888140 has 48 divisors (see below), whose sum is σ = 41041728. Its totient is φ = 7298304.

The previous prime is 18888119. The next prime is 18888151. The reversal of 18888140 is 4188881.

It is a junction number, because it is equal to n+sod(n) for n = 18888094 and 18888103.

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, 109094 + ... + 109266.

It is an arithmetic number, because the mean of its divisors is an integer number (855036).

Almost surely, 2^18888140 is an apocalyptic number.

18888140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18888140 is an abundant number, since it is smaller than the sum of its proper divisors (22153588).

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

18888140 is a wasteful number, since it uses less digits than its factorization.

18888140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 38.

The square root of 18888140 is about 4346.0487802140. The cubic root of 18888140 is about 266.3154717137.

The spelling of 18888140 in words is "eighteen million, eight hundred eighty-eight thousand, one hundred forty".