18168128 has 56 divisors (see below), whose sum is σ = 39831264. Its totient is φ = 8153600.

The previous prime is 18168113. The next prime is 18168149. The reversal of 18168128 is 82186181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92126 + ... + 92322.

Almost surely, 2^18168128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18168128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19915632).

18168128 is an abundant number, since it is smaller than the sum of its proper divisors (21663136).

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

18168128 is a wasteful number, since it uses less digits than its factorization.

18168128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 341 counting only the distinct ones).

The product of its digits is 6144, while the sum is 35.

The square root of 18168128 is about 4262.4087086998. The cubic root of 18168128 is about 262.8875750165.

The spelling of 18168128 in words is "eighteen million, one hundred sixty-eight thousand, one hundred twenty-eight".