891940 has 48 divisors (see below), whose sum is σ = 2241792. Its totient is φ = 291456.

The previous prime is 891929. The next prime is 891967. The reversal of 891940 is 49198.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3082 + ... + 3358.

It is an arithmetic number, because the mean of its divisors is an integer number (46704).

2⁸⁹¹⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 891940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1120896).

891940 is an abundant number, since it is smaller than the sum of its proper divisors (1349852).

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

891940 is a wasteful number, since it uses less digits than its factorization.

891940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 891940 is about 944.4257514490. The cubic root of 891940 is about 96.2598573139.

The spelling of 891940 in words is "eight hundred ninety-one thousand, nine hundred forty".