18366880 has 144 divisors (see below), whose sum is σ = 53512704. Its totient is φ = 5829120.

The previous prime is 18366869. The next prime is 18366899. The reversal of 18366880 is 8866381.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 592465 + ... + 592495.

It is an arithmetic number, because the mean of its divisors is an integer number (371616).

Almost surely, 2^18366880 is an apocalyptic number.

18366880 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 18366880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26756352).

18366880 is an abundant number, since it is smaller than the sum of its proper divisors (35145824).

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

18366880 is a wasteful number, since it uses less digits than its factorization.

18366880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 18366880 is about 4285.6598091776. The cubic root of 18366880 is about 263.8427284890.

The spelling of 18366880 in words is "eighteen million, three hundred sixty-six thousand, eight hundred eighty".