18398084 has 12 divisors (see below), whose sum is σ = 32228700. Its totient is φ = 9189888.

The previous prime is 18398071. The next prime is 18398101. The reversal of 18398084 is 48089381.

It can be written as a sum of positive squares in 2 ways, for example, as 10956100 + 7441984 = 3310^2 + 2728^2 .

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 3 ways as a sum of consecutive naturals, for example, 4412 + ... + 7500.

It is an arithmetic number, because the mean of its divisors is an integer number (2685725).

Almost surely, 2^18398084 is an apocalyptic number.

It is an amenable number.

18398084 is a deficient number, since it is larger than the sum of its proper divisors (13830616).

18398084 is a wasteful number, since it uses less digits than its factorization.

18398084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4582 (or 4580 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 18398084 is about 4289.2987771896. The cubic root of 18398084 is about 263.9920605203.

The spelling of 18398084 in words is "eighteen million, three hundred ninety-eight thousand, eighty-four".