891384 has 32 divisors (see below), whose sum is σ = 2400720. Its totient is φ = 274176.

The previous prime is 891379. The next prime is 891389. The reversal of 891384 is 483198.

It is an interprime number because it is at equal distance from previous prime (891379) and next prime (891389).

It is a super-3 number, since 3×891384³ = 2124788748355533312, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891389) by changing a digit.

891384 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 7 ways as a sum of consecutive naturals, for example, 1117 + ... + 1740.

2⁸⁹¹³⁸⁴ is an apocalyptic number.

It is an amenable number.

891384 is an abundant number, since it is smaller than the sum of its proper divisors (1509336).

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

891384 is a wasteful number, since it uses less digits than its factorization.

891384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879 (or 2875 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 891384 is about 944.1313467945. The cubic root of 891384 is about 96.2398516314.

It can be divided in two parts, 891 and 384, that added together give a triangular number (1275 = T₅₀).

The spelling of 891384 in words is "eight hundred ninety-one thousand, three hundred eighty-four".