89720520 has 64 divisors (see below), whose sum is σ = 274259520. Its totient is φ = 23472384.

The previous prime is 89720483. The next prime is 89720549. The reversal of 89720520 is 2502798.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 694 + ... + 13413.

It is an arithmetic number, because the mean of its divisors is an integer number (4285305).

Almost surely, 2^89720520 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 89720520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137129760).

89720520 is an abundant number, since it is smaller than the sum of its proper divisors (184539000).

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

89720520 is a wasteful number, since it uses less digits than its factorization.

89720520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14174 (or 14170 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 89720520 is about 9472.0916380702. The cubic root of 89720520 is about 447.6761184786.

The spelling of 89720520 in words is "eighty-nine million, seven hundred twenty thousand, five hundred twenty".