18457408 has 28 divisors (see below), whose sum is σ = 38221920. Its totient is φ = 8826752.

The previous prime is 18457399. The next prime is 18457423. The reversal of 18457408 is 80475481.

It is a Smith number, since the sum of its digits (37) 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, 4798 + ... + 7741.

Almost surely, 2^18457408 is an apocalyptic number.

It is an amenable number.

18457408 is an abundant number, since it is smaller than the sum of its proper divisors (19764512).

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

18457408 is a wasteful number, since it uses less digits than its factorization.

18457408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12574 (or 12564 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 18457408 is about 4296.2085610454. The cubic root of 18457408 is about 264.2755005827.

The spelling of 18457408 in words is "eighteen million, four hundred fifty-seven thousand, four hundred eight".