18398030 has 24 divisors (see below), whose sum is σ = 38524248. Its totient is φ = 6307728.

The previous prime is 18398021. The next prime is 18398069. The reversal of 18398030 is 3089381.

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 18284 + ... + 19263.

It is an arithmetic number, because the mean of its divisors is an integer number (1605177).

Almost surely, 2^18398030 is an apocalyptic number.

18398030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18398030 is an abundant number, since it is smaller than the sum of its proper divisors (20126218).

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

18398030 is a wasteful number, since it uses less digits than its factorization.

18398030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37568 (or 37561 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 18398030 is about 4289.2924824498. The cubic root of 18398030 is about 263.9918022401.

The spelling of 18398030 in words is "eighteen million, three hundred ninety-eight thousand, thirty".