891880 has 32 divisors (see below), whose sum is σ = 2190240. Its totient is φ = 324160.

The previous prime is 891859. The next prime is 891887. The reversal of 891880 is 88198.

It is not an unprimeable number, because it can be changed into a prime (891887) by changing a digit.

891880 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, 574 + ... + 1453.

It is an arithmetic number, because the mean of its divisors is an integer number (68445).

2⁸⁹¹⁸⁸⁰ is an apocalyptic number.

It is an amenable number.

891880 is an abundant number, since it is smaller than the sum of its proper divisors (1298360).

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

891880 is a wasteful number, since it uses less digits than its factorization.

891880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049 (or 2045 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 891880 is about 944.3939855802. The cubic root of 891880 is about 96.2576988276.

It can be divided in two parts, 8918 and 80, that added together give a palindrome (8998).

The spelling of 891880 in words is "eight hundred ninety-one thousand, eight hundred eighty".