891984 has 20 divisors (see below), whose sum is σ = 2304416. Its totient is φ = 297312.

The previous prime is 891983. The next prime is 891991. The reversal of 891984 is 489198.

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 891984.

It is not an unprimeable number, because it can be changed into a prime (891983) 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, 9244 + ... + 9339.

2⁸⁹¹⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

891984 is an abundant number, since it is smaller than the sum of its proper divisors (1412432).

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

891984 is a wasteful number, since it uses less digits than its factorization.

891984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18594 (or 18588 counting only the distinct ones).

The product of its digits is 20736, while the sum is 39.

The square root of 891984 is about 944.4490457404. The cubic root of 891984 is about 96.2614401424.

The spelling of 891984 in words is "eight hundred ninety-one thousand, nine hundred eighty-four".