18648880 has 40 divisors (see below), whose sum is σ = 45644400. Its totient is φ = 7066368.

The previous prime is 18648869. The next prime is 18648901. The reversal of 18648880 is 8884681.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4615 + ... + 7654.

It is an arithmetic number, because the mean of its divisors is an integer number (1141110).

Almost surely, 2^18648880 is an apocalyptic number.

18648880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18648880 is an abundant number, since it is smaller than the sum of its proper divisors (26995520).

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

18648880 is a wasteful number, since it uses less digits than its factorization.

18648880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12301 (or 12295 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 43.

The square root of 18648880 is about 4318.4349016744. The cubic root of 18648880 is about 265.1861987939.

The spelling of 18648880 in words is "eighteen million, six hundred forty-eight thousand, eight hundred eighty".