89161728 has 64 divisors (see below), whose sum is σ = 238023120. Its totient is φ = 29687808.

The previous prime is 89161717. The next prime is 89161733. The reversal of 89161728 is 82716198.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 89161728.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97851 + ... + 98757.

Almost surely, 2^89161728 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 89161728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119011560).

89161728 is an abundant number, since it is smaller than the sum of its proper divisors (148861392).

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

89161728 is an frugal number, since it uses more digits than its factorization.

89161728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940 (or 912 counting only the distinct ones).

The product of its digits is 48384, while the sum is 42.

The square root of 89161728 is about 9442.5488084521. The cubic root of 89161728 is about 446.7447857228.

The spelling of 89161728 in words is "eighty-nine million, one hundred sixty-one thousand, seven hundred twenty-eight".