89017720 has 64 divisors (see below), whose sum is σ = 219542400. Its totient is φ = 32215680.

The previous prime is 89017693. The next prime is 89017739. The reversal of 89017720 is 2771098.

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, 134751 + ... + 135409.

It is an arithmetic number, because the mean of its divisors is an integer number (3430350).

Almost surely, 2^89017720 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 89017720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109771200).

89017720 is an abundant number, since it is smaller than the sum of its proper divisors (130524680).

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

89017720 is a wasteful number, since it uses less digits than its factorization.

89017720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 89017720 is about 9434.9202434361. The cubic root of 89017720 is about 446.5041387843.

The spelling of 89017720 in words is "eighty-nine million, seventeen thousand, seven hundred twenty".