981323128 has 16 divisors (see below), whose sum is σ = 1849230000. Its totient is φ = 488195136.

The previous prime is 981323117. The next prime is 981323137. The reversal of 981323128 is 821323189.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306613 + ... + 309796.

It is an arithmetic number, because the mean of its divisors is an integer number (115576875).

Almost surely, 2^981323128 is an apocalyptic number.

It is an amenable number.

981323128 is a deficient number, since it is larger than the sum of its proper divisors (867906872).

981323128 is a wasteful number, since it uses less digits than its factorization.

981323128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616614 (or 616610 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 981323128 is about 31326.0774435613. The cubic root of 981323128 is about 993.7352103702.

The spelling of 981323128 in words is "nine hundred eighty-one million, three hundred twenty-three thousand, one hundred twenty-eight".