89840520 has 288 divisors, whose sum is σ = 371329920. Its totient is φ = 18627840.

The previous prime is 89840503. The next prime is 89840533. The reversal of 89840520 is 2504898.

89840520 is a `hidden beast` number, since 8 + 98 + 40 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 193809 + ... + 194271.

It is an arithmetic number, because the mean of its divisors is an integer number (1289340).

Almost surely, 2^89840520 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 89840520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185664960).

89840520 is an abundant number, since it is smaller than the sum of its proper divisors (281489400).

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

89840520 is a wasteful number, since it uses less digits than its factorization.

89840520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 89840520 is about 9478.4239196187. The cubic root of 89840520 is about 447.8756165108.

The spelling of 89840520 in words is "eighty-nine million, eight hundred forty thousand, five hundred twenty".