18008798 has 4 divisors (see below), whose sum is σ = 27013200. Its totient is φ = 9004398.

The previous prime is 18008777. The next prime is 18008801. The reversal of 18008798 is 89780081.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 4502198 + ... + 4502201.

It is an arithmetic number, because the mean of its divisors is an integer number (6753300).

Almost surely, 2^18008798 is an apocalyptic number.

18008798 is a deficient number, since it is larger than the sum of its proper divisors (9004402).

18008798 is an equidigital number, since it uses as much as digits as its factorization.

18008798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9004401.

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 18008798 is about 4243.6774146959. The cubic root of 18008798 is about 262.1168311379.

The spelling of 18008798 in words is "eighteen million, eight thousand, seven hundred ninety-eight".