981128 has 16 divisors (see below), whose sum is σ = 1903500. Its totient is φ = 473536.

The previous prime is 981091. The next prime is 981133. The reversal of 981128 is 821189.

981128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 850084 + 131044 = 922^2 + 362^2 .

It is a super-3 number, since 3×981128³ = 2833337207532627456, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 981128.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 981128.

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, 1883 + ... + 2346.

2⁹⁸¹¹²⁸ is an apocalyptic number.

It is an amenable number.

981128 is a deficient number, since it is larger than the sum of its proper divisors (922372).

981128 is a wasteful number, since it uses less digits than its factorization.

981128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264 (or 4260 counting only the distinct ones).

The product of its digits is 1152, while the sum is 29.

The square root of 981128 is about 990.5190558490. The cubic root of 981128 is about 99.3669340657.

The spelling of 981128 in words is "nine hundred eighty-one thousand, one hundred twenty-eight".