18368398 has 32 divisors (see below), whose sum is σ = 30917376. Its totient is φ = 8139648.

The previous prime is 18368393. The next prime is 18368401. The reversal of 18368398 is 89386381.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18368393) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 64765 + ... + 65047.

It is an arithmetic number, because the mean of its divisors is an integer number (966168).

Almost surely, 2^18368398 is an apocalyptic number.

18368398 is a deficient number, since it is larger than the sum of its proper divisors (12548978).

18368398 is a wasteful number, since it uses less digits than its factorization.

18368398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408.

The product of its digits is 248832, while the sum is 46.

The square root of 18368398 is about 4285.8369077696. The cubic root of 18368398 is about 263.8499970475.

The spelling of 18368398 in words is "eighteen million, three hundred sixty-eight thousand, three hundred ninety-eight".