89728188 has 48 divisors (see below), whose sum is σ = 230186880. Its totient is φ = 26977600.

The previous prime is 89728187. The next prime is 89728211. The reversal of 89728188 is 88182798.

It is a happy number.

It is a super-2 number, since 2×89728188² = 16102295443526688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 89728188.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89728187) 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 15 ways as a sum of consecutive naturals, for example, 14698 + ... + 19886.

It is an arithmetic number, because the mean of its divisors is an integer number (4795560).

Almost surely, 2^89728188 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 89728188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115093440).

89728188 is an abundant number, since it is smaller than the sum of its proper divisors (140458692).

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

89728188 is a wasteful number, since it uses less digits than its factorization.

89728188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5338 (or 5336 counting only the distinct ones).

The product of its digits is 516096, while the sum is 51.

The square root of 89728188 is about 9472.4963974657. The cubic root of 89728188 is about 447.6888717213.

The spelling of 89728188 in words is "eighty-nine million, seven hundred twenty-eight thousand, one hundred eighty-eight".