18398136 has 32 divisors (see below), whose sum is σ = 46287360. Its totient is φ = 6093792.

The previous prime is 18398129. The next prime is 18398143. The reversal of 18398136 is 63189381.

It is an interprime number because it is at equal distance from previous prime (18398129) and next prime (18398143).

It is a junction number, because it is equal to n+sod(n) for n = 18398094 and 18398103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1561 + ... + 6263.

It is an arithmetic number, because the mean of its divisors is an integer number (1446480).

Almost surely, 2^18398136 is an apocalyptic number.

It is an amenable number.

18398136 is an abundant number, since it is smaller than the sum of its proper divisors (27889224).

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

18398136 is a wasteful number, since it uses less digits than its factorization.

18398136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4875 (or 4871 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 18398136 is about 4289.3048387822. The cubic root of 18398136 is about 263.9923092342.

The spelling of 18398136 in words is "eighteen million, three hundred ninety-eight thousand, one hundred thirty-six".