18857088 has 48 divisors (see below), whose sum is σ = 54266550. Its totient is φ = 6285312.

The previous prime is 18857081. The next prime is 18857099. The reversal of 18857088 is 88075881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17239104 + 1617984 = 4152^2 + 1272^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18857081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7033 + ... + 9336.

Almost surely, 2^18857088 is an apocalyptic number.

18857088 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18857088 is an abundant number, since it is smaller than the sum of its proper divisors (35409462).

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

18857088 is a wasteful number, since it uses less digits than its factorization.

18857088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16389 (or 16374 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 45.

The square root of 18857088 is about 4342.4748703936. The cubic root of 18857088 is about 266.1694512672.

The spelling of 18857088 in words is "eighteen million, eight hundred fifty-seven thousand, eighty-eight".