18630880 has 24 divisors (see below), whose sum is σ = 44015832. Its totient is φ = 7452288.

The previous prime is 18630877. The next prime is 18630901. The reversal of 18630880 is 8803681.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

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, 58062 + ... + 58381.

It is an arithmetic number, because the mean of its divisors is an integer number (1833993).

Almost surely, 2^18630880 is an apocalyptic number.

18630880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18630880 is an abundant number, since it is smaller than the sum of its proper divisors (25384952).

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

18630880 is a wasteful number, since it uses less digits than its factorization.

18630880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116458 (or 116450 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 18630880 is about 4316.3503101579. The cubic root of 18630880 is about 265.1008516103.

The spelling of 18630880 in words is "eighteen million, six hundred thirty thousand, eight hundred eighty".