989728 has 24 divisors (see below), whose sum is σ = 1970892. Its totient is φ = 489216.

The previous prime is 989719. The next prime is 989743. The reversal of 989728 is 827989.

It can be written as a sum of positive squares in 2 ways, for example, as 944784 + 44944 = 972^2 + 212^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4926 + ... + 5122.

2⁹⁸⁹⁷²⁸ is an apocalyptic number.

It is an amenable number.

989728 is a deficient number, since it is larger than the sum of its proper divisors (981164).

989728 is a wasteful number, since it uses less digits than its factorization.

989728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 356 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 989728 is about 994.8507425740. The cubic root of 989728 is about 99.6564208859.

The spelling of 989728 in words is "nine hundred eighty-nine thousand, seven hundred twenty-eight".