89618820 has 96 divisors (see below), whose sum is σ = 266649600. Its totient is φ = 22425984.

The previous prime is 89618807. The next prime is 89618857. The reversal of 89618820 is 2881698.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144471 + ... + 145089.

It is an arithmetic number, because the mean of its divisors is an integer number (2777600).

Almost surely, 2^89618820 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 89618820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133324800).

89618820 is an abundant number, since it is smaller than the sum of its proper divisors (177030780).

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

89618820 is a wasteful number, since it uses less digits than its factorization.

89618820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 89618820 is about 9466.7217134550. The cubic root of 89618820 is about 447.5069045885.

The spelling of 89618820 in words is "eighty-nine million, six hundred eighteen thousand, eight hundred twenty".