981992 has 16 divisors (see below), whose sum is σ = 2008800. Its totient is φ = 446320.

The previous prime is 981983. The next prime is 982021. The reversal of 981992 is 299189.

It is a zygodrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 981992.

It is an unprimeable number.

981992 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5492 + ... + 5667.

It is an arithmetic number, because the mean of its divisors is an integer number (125550).

981992 is a Friedman number, since it can be written as 991^2-89, using all its digits and the basic arithmetic operations.

2⁹⁸¹⁹⁹² is an apocalyptic number.

It is an amenable number.

981992 is an abundant number, since it is smaller than the sum of its proper divisors (1026808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

981992 is a wasteful number, since it uses less digits than its factorization.

981992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11176 (or 11172 counting only the distinct ones).

The product of its digits is 11664, while the sum is 38.

The square root of 981992 is about 990.9550948454. The cubic root of 981992 is about 99.3960936460.

The spelling of 981992 in words is "nine hundred eighty-one thousand, nine hundred ninety-two".