18268880 has 160 divisors (see below), whose sum is σ = 54639360. Its totient is φ = 5529600.

The previous prime is 18268849. The next prime is 18268891. The reversal of 18268880 is 8886281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180830 + ... + 180930.

It is an arithmetic number, because the mean of its divisors is an integer number (341496).

Almost surely, 2^18268880 is an apocalyptic number.

18268880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18268880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27319680).

18268880 is an abundant number, since it is smaller than the sum of its proper divisors (36370480).

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

18268880 is a wasteful number, since it uses less digits than its factorization.

18268880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 41.

The square root of 18268880 is about 4274.2110383087. The cubic root of 18268880 is about 263.3726302871.

The spelling of 18268880 in words is "eighteen million, two hundred sixty-eight thousand, eight hundred eighty".