89818820 has 96 divisors (see below), whose sum is σ = 245887488. Its totient is φ = 26744832.

The previous prime is 89818819. The next prime is 89818847. The reversal of 89818820 is 2881898.

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, 29489 + ... + 32391.

It is an arithmetic number, because the mean of its divisors is an integer number (2561328).

Almost surely, 2^89818820 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 89818820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122943744).

89818820 is an abundant number, since it is smaller than the sum of its proper divisors (156068668).

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

89818820 is a wasteful number, since it uses less digits than its factorization.

89818820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2949 (or 2947 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 44.

The square root of 89818820 is about 9477.2791454088. The cubic root of 89818820 is about 447.8395537799.

The spelling of 89818820 in words is "eighty-nine million, eight hundred eighteen thousand, eight hundred twenty".