89728080 has 80 divisors (see below), whose sum is σ = 299564160. Its totient is φ = 22086144.

The previous prime is 89728073. The next prime is 89728087. The reversal of 89728080 is 8082798.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (89728073) and next prime (89728087).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×89728080² = 16102256680972800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89728087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11260 + ... + 17499.

It is an arithmetic number, because the mean of its divisors is an integer number (3744552).

Almost surely, 2^89728080 is an apocalyptic number.

89728080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

89728080 is an abundant number, since it is smaller than the sum of its proper divisors (209836080).

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

89728080 is a wasteful number, since it uses less digits than its factorization.

89728080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28788 (or 28782 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 89728080 is about 9472.4906967492. The cubic root of 89728080 is about 447.6886921032.

The spelling of 89728080 in words is "eighty-nine million, seven hundred twenty-eight thousand, eighty".