18408768 has 56 divisors (see below), whose sum is σ = 55668672. Its totient is φ = 5259264.

The previous prime is 18408751. The next prime is 18408787. The reversal of 18408768 is 86780481.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5505 + ... + 8192.

Almost surely, 2^18408768 is an apocalyptic number.

It is an amenable number.

18408768 is an abundant number, since it is smaller than the sum of its proper divisors (37259904).

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

18408768 is a wasteful number, since it uses less digits than its factorization.

18408768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13719 (or 13709 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 18408768 is about 4290.5440214500. The cubic root of 18408768 is about 264.0431518076.

The spelling of 18408768 in words is "eighteen million, four hundred eight thousand, seven hundred sixty-eight".