89811816 has 64 divisors (see below), whose sum is σ = 238956480. Its totient is φ = 28032000.

The previous prime is 89811809. The next prime is 89811817. The reversal of 89811816 is 61811898.

It is not an unprimeable number, because it can be changed into a prime (89811817) 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, 101970 + ... + 102846.

It is an arithmetic number, because the mean of its divisors is an integer number (3733695).

Almost surely, 2^89811816 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 89811816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119478240).

89811816 is an abundant number, since it is smaller than the sum of its proper divisors (149144664).

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

89811816 is a wasteful number, since it uses less digits than its factorization.

89811816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154 (or 1150 counting only the distinct ones).

The product of its digits is 27648, while the sum is 42.

The square root of 89811816 is about 9476.9096228676. The cubic root of 89811816 is about 447.8279127535.

The spelling of 89811816 in words is "eighty-nine million, eight hundred eleven thousand, eight hundred sixteen".