981328 has 10 divisors (see below), whose sum is σ = 1901354. Its totient is φ = 490656.

The previous prime is 981319. The next prime is 981373. The reversal of 981328 is 823189.

It can be written as a sum of positive squares in only one way, i.e., 976144 + 5184 = 988^2 + 72^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 981328.

It is a congruent number.

It is an unprimeable number.

981328 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30651 + ... + 30682.

2⁹⁸¹³²⁸ is an apocalyptic number.

It is an amenable number.

981328 is a deficient number, since it is larger than the sum of its proper divisors (920026).

981328 is a wasteful number, since it uses less digits than its factorization.

981328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61341 (or 61335 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 981328 is about 990.6200078739. The cubic root of 981328 is about 99.3736854908.

The spelling of 981328 in words is "nine hundred eighty-one thousand, three hundred twenty-eight".