89481720 has 64 divisors (see below), whose sum is σ = 271872000. Its totient is φ = 23557248.

The previous prime is 89481703. The next prime is 89481731. The reversal of 89481720 is 2718498.

It is a congruent number.

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, 4761 + ... + 14199.

It is an arithmetic number, because the mean of its divisors is an integer number (4248000).

Almost surely, 2^89481720 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 89481720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135936000).

89481720 is an abundant number, since it is smaller than the sum of its proper divisors (182390280).

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

89481720 is a wasteful number, since it uses less digits than its factorization.

89481720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9532 (or 9528 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 89481720 is about 9459.4777868548. The cubic root of 89481720 is about 447.2785875544.

The spelling of 89481720 in words is "eighty-nine million, four hundred eighty-one thousand, seven hundred twenty".