18398908 has 12 divisors (see below), whose sum is σ = 35125272. Its totient is φ = 8363120.

The previous prime is 18398899. The next prime is 18398911. The reversal of 18398908 is 80989381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209035 + ... + 209122.

It is an arithmetic number, because the mean of its divisors is an integer number (2927106).

Almost surely, 2^18398908 is an apocalyptic number.

It is an amenable number.

18398908 is a deficient number, since it is larger than the sum of its proper divisors (16726364).

18398908 is a wasteful number, since it uses less digits than its factorization.

18398908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418172 (or 418170 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 18398908 is about 4289.3948291105. The cubic root of 18398908 is about 263.9960016229.

It can be divided in two parts, 18398 and 908, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 18398908 in words is "eighteen million, three hundred ninety-eight thousand, nine hundred eight".