89881566 has 16 divisors (see below), whose sum is σ = 180276624. Its totient is φ = 29874944.

The previous prime is 89881543. The next prime is 89881577. The reversal of 89881566 is 66518898.

It is a super-2 number, since 2×89881566² = 16157391813224712, 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19101 + ... + 23336.

It is an arithmetic number, because the mean of its divisors is an integer number (11267289).

Almost surely, 2^89881566 is an apocalyptic number.

89881566 is an abundant number, since it is smaller than the sum of its proper divisors (90395058).

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

89881566 is a wasteful number, since it uses less digits than its factorization.

89881566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42795.

The product of its digits is 829440, while the sum is 51.

The square root of 89881566 is about 9480.5889057590. The cubic root of 89881566 is about 447.9438140368.

The spelling of 89881566 in words is "eighty-nine million, eight hundred eighty-one thousand, five hundred sixty-six".