89173720 has 32 divisors (see below), whose sum is σ = 201697920. Its totient is φ = 35481600.

The previous prime is 89173703. The next prime is 89173739. The reversal of 89173720 is 2737198.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 89173720.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1945 + ... + 13495.

It is an arithmetic number, because the mean of its divisors is an integer number (6303060).

Almost surely, 2^89173720 is an apocalyptic number.

It is an amenable number.

89173720 is an abundant number, since it is smaller than the sum of its proper divisors (112524200).

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

89173720 is a wasteful number, since it uses less digits than its factorization.

89173720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11755 (or 11751 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 89173720 is about 9443.1837851437. The cubic root of 89173720 is about 446.7648134613.

The spelling of 89173720 in words is "eighty-nine million, one hundred seventy-three thousand, seven hundred twenty".