89811612 has 96 divisors (see below), whose sum is σ = 269015040. Its totient is φ = 25608960.

The previous prime is 89811599. The next prime is 89811641. The reversal of 89811612 is 21611898.

It is a super-2 number, since 2×89811612² = 16132251300077088, which contains 22 as substring.

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

It is a congruent number.

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, 17973 + ... + 22419.

It is an arithmetic number, because the mean of its divisors is an integer number (2802240).

Almost surely, 2^89811612 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 89811612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134507520).

89811612 is an abundant number, since it is smaller than the sum of its proper divisors (179203428).

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

89811612 is a wasteful number, since it uses less digits than its factorization.

89811612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4488 (or 4480 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 89811612 is about 9476.8988598592. The cubic root of 89811612 is about 447.8275736854.

The spelling of 89811612 in words is "eighty-nine million, eight hundred eleven thousand, six hundred twelve".