18056408 has 8 divisors (see below), whose sum is σ = 33855780. Its totient is φ = 9028200.

The previous prime is 18056399. The next prime is 18056417. The reversal of 18056408 is 80465081.

It is an interprime number because it is at equal distance from previous prime (18056399) and next prime (18056417).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128518 + ... + 1128533.

Almost surely, 2^18056408 is an apocalyptic number.

It is an amenable number.

18056408 is a deficient number, since it is larger than the sum of its proper divisors (15799372).

18056408 is a wasteful number, since it uses less digits than its factorization.

18056408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257057 (or 2257053 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 18056408 is about 4249.2832336760. The cubic root of 18056408 is about 262.3476146541.

The spelling of 18056408 in words is "eighteen million, fifty-six thousand, four hundred eight".