18870488 has 96 divisors (see below), whose sum is σ = 46452000. Its totient is φ = 7140672.

The previous prime is 18870479. The next prime is 18870521. The reversal of 18870488 is 88407881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 820445 + ... + 820467.

It is an arithmetic number, because the mean of its divisors is an integer number (483875).

Almost surely, 2^18870488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18870488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23226000).

18870488 is an abundant number, since it is smaller than the sum of its proper divisors (27581512).

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

18870488 is a wasteful number, since it uses less digits than its factorization.

18870488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 44.

The square root of 18870488 is about 4344.0174953607. The cubic root of 18870488 is about 266.2324837309.

The spelling of 18870488 in words is "eighteen million, eight hundred seventy thousand, four hundred eighty-eight".