891992 has 16 divisors (see below), whose sum is σ = 1712040. Its totient is φ = 435456.

The previous prime is 891991. The next prime is 891997. The reversal of 891992 is 299198.

891992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 891992.

It is not an unprimeable number, because it can be changed into a prime (891991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 953 + ... + 1640.

2⁸⁹¹⁹⁹² is an apocalyptic number.

It is an amenable number.

891992 is a deficient number, since it is larger than the sum of its proper divisors (820048).

891992 is a wasteful number, since it uses less digits than its factorization.

891992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642 (or 2638 counting only the distinct ones).

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

The square root of 891992 is about 944.4532810044. The cubic root of 891992 is about 96.2617279238.

The spelling of 891992 in words is "eight hundred ninety-one thousand, nine hundred ninety-two".