89728560 has 200 divisors, whose sum is σ = 318144816. Its totient is φ = 23431680.

The previous prime is 89728559. The next prime is 89728571. The reversal of 89728560 is 6582798.

89728560 is a `hidden beast` number, since 89 + 7 + 2 + 8 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 39 ways as a sum of consecutive naturals, for example, 395167 + ... + 395393.

Almost surely, 2^89728560 is an apocalyptic number.

89728560 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89728560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159072408).

89728560 is an abundant number, since it is smaller than the sum of its proper divisors (228416256).

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

89728560 is a wasteful number, since it uses less digits than its factorization.

89728560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 89728560 is about 9472.5160332406. The cubic root of 89728560 is about 447.6894904047.

The spelling of 89728560 in words is "eighty-nine million, seven hundred twenty-eight thousand, five hundred sixty".