89742728 has 16 divisors (see below), whose sum is σ = 178165980. Its totient is φ = 42231808.

The previous prime is 89742707. The next prime is 89742743. The reversal of 89742728 is 82724798.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68194564 + 21548164 = 8258^2 + 4642^2 .

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 3 ways as a sum of consecutive naturals, for example, 329801 + ... + 330072.

Almost surely, 2^89742728 is an apocalyptic number.

It is an amenable number.

89742728 is a deficient number, since it is larger than the sum of its proper divisors (88423252).

89742728 is a wasteful number, since it uses less digits than its factorization.

89742728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659896 (or 659892 counting only the distinct ones).

The product of its digits is 451584, while the sum is 47.

The square root of 89742728 is about 9473.2638514928. The cubic root of 89742728 is about 447.7130523226.

The spelling of 89742728 in words is "eighty-nine million, seven hundred forty-two thousand, seven hundred twenty-eight".