18408860 has 12 divisors (see below), whose sum is σ = 38658648. Its totient is φ = 7363536.

The previous prime is 18408847. The next prime is 18408883. The reversal of 18408860 is 6880481.

It is a super-2 number, since 2×18408860² = 677772252999200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18408860.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460202 + ... + 460241.

It is an arithmetic number, because the mean of its divisors is an integer number (3221554).

Almost surely, 2^18408860 is an apocalyptic number.

18408860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18408860 is an abundant number, since it is smaller than the sum of its proper divisors (20249788).

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

18408860 is a wasteful number, since it uses less digits than its factorization.

18408860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920452 (or 920450 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 18408860 is about 4290.5547426877. The cubic root of 18408860 is about 264.0435916692.

The spelling of 18408860 in words is "eighteen million, four hundred eight thousand, eight hundred sixty".