89571820 has 48 divisors (see below), whose sum is σ = 208067328. Its totient is φ = 32175360.

The previous prime is 89571817. The next prime is 89571863. The reversal of 89571820 is 2817598.

It is a super-2 number, since 2×89571820² = 16046221876224800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4965 + ... + 14275.

It is an arithmetic number, because the mean of its divisors is an integer number (4334736).

Almost surely, 2^89571820 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 89571820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104033664).

89571820 is an abundant number, since it is smaller than the sum of its proper divisors (118495508).

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

89571820 is a wasteful number, since it uses less digits than its factorization.

89571820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9370 (or 9368 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 89571820 is about 9464.2390079710. The cubic root of 89571820 is about 447.4286602256.

The spelling of 89571820 in words is "eighty-nine million, five hundred seventy-one thousand, eight hundred twenty".