89821020 has 48 divisors (see below), whose sum is σ = 252040320. Its totient is φ = 23900736.

The previous prime is 89821019. The next prime is 89821021. The reversal of 89821020 is 2012898.

It is an interprime number because it is at equal distance from previous prime (89821019) and next prime (89821021).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89821021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32451 + ... + 35109.

It is an arithmetic number, because the mean of its divisors is an integer number (5250840).

Almost surely, 2^89821020 is an apocalyptic number.

It is an amenable number.

89821020 is an abundant number, since it is smaller than the sum of its proper divisors (162219300).

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

89821020 is a wasteful number, since it uses less digits than its factorization.

89821020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234 (or 3232 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 89821020 is about 9477.3952117657. The cubic root of 89821020 is about 447.8432101739.

The spelling of 89821020 in words is "eighty-nine million, eight hundred twenty-one thousand, twenty".