89997972 has 24 divisors (see below), whose sum is σ = 210494592. Its totient is φ = 29928000.

The previous prime is 89997923. The next prime is 89997989. The reversal of 89997972 is 27979998.

It is a happy number.

It is a super-2 number, since 2×89997972² = 16199269928225568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3529 + ... + 13872.

It is an arithmetic number, because the mean of its divisors is an integer number (8770608).

Almost surely, 2^89997972 is an apocalyptic number.

It is an amenable number.

89997972 is an abundant number, since it is smaller than the sum of its proper divisors (120496620).

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

89997972 is a wasteful number, since it uses less digits than its factorization.

89997972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17839 (or 17837 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 60.

The square root of 89997972 is about 9486.7260949181. The cubic root of 89997972 is about 448.1371085975.

The spelling of 89997972 in words is "eighty-nine million, nine hundred ninety-seven thousand, nine hundred seventy-two".