18290880 has 224 divisors, whose sum is σ = 67665600. Its totient is φ = 4644864.

The previous prime is 18290873. The next prime is 18290891. The reversal of 18290880 is 8809281.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 250524 + ... + 250596.

Almost surely, 2^18290880 is an apocalyptic number.

18290880 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 18290880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33832800).

18290880 is an abundant number, since it is smaller than the sum of its proper divisors (49374720).

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

18290880 is a wasteful number, since it uses less digits than its factorization.

18290880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 18290880 is about 4276.7838383533. The cubic root of 18290880 is about 263.4783086057.

The spelling of 18290880 in words is "eighteen million, two hundred ninety thousand, eight hundred eighty".