89728820 has 24 divisors (see below), whose sum is σ = 188776224. Its totient is φ = 35825696.

The previous prime is 89728799. The next prime is 89728861. The reversal of 89728820 is 2882798.

It is a super-2 number, since 2×89728820² = 16102522277184800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7919 + ... + 15561.

It is an arithmetic number, because the mean of its divisors is an integer number (7865676).

Almost surely, 2^89728820 is an apocalyptic number.

It is an amenable number.

89728820 is an abundant number, since it is smaller than the sum of its proper divisors (99047404).

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

89728820 is a wasteful number, since it uses less digits than its factorization.

89728820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8239 (or 8237 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 89728820 is about 9472.5297571451. The cubic root of 89728820 is about 447.6899228168.

The spelling of 89728820 in words is "eighty-nine million, seven hundred twenty-eight thousand, eight hundred twenty".