89569728 has 84 divisors (see below), whose sum is σ = 267937488. Its totient is φ = 28554240.

The previous prime is 89569723. The next prime is 89569771. The reversal of 89569728 is 82796598.

It is a happy number.

89569728 is a `hidden beast` number, since 8 + 9 + 569 + 72 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89569723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9868 + ... + 16628.

It is an arithmetic number, because the mean of its divisors is an integer number (3189732).

Almost surely, 2^89569728 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 89569728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133968744).

89569728 is an abundant number, since it is smaller than the sum of its proper divisors (178367760).

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

89569728 is a wasteful number, since it uses less digits than its factorization.

89569728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6802 (or 6789 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 89569728 is about 9464.1284860255. The cubic root of 89569728 is about 447.4251768828.

The spelling of 89569728 in words is "eighty-nine million, five hundred sixty-nine thousand, seven hundred twenty-eight".