818990880 has 192 divisors, whose sum is σ = 2661579648. Its totient is φ = 211599360.

The previous prime is 818990863. The next prime is 818990911. The reversal of 818990880 is 88099818.

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, 2430072 + ... + 2430408.

It is an arithmetic number, because the mean of its divisors is an integer number (13862394).

Almost surely, 2^818990880 is an apocalyptic number.

818990880 is a gapful number since it is divisible by the number (80) 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 818990880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330789824).

818990880 is an abundant number, since it is smaller than the sum of its proper divisors (1842588768).

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

818990880 is a wasteful number, since it uses less digits than its factorization.

818990880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 51.

The square root of 818990880 is about 28618.0167027696. The cubic root of 818990880 is about 935.6060508860.

The spelling of 818990880 in words is "eight hundred eighteen million, nine hundred ninety thousand, eight hundred eighty".