891320 has 16 divisors (see below), whose sum is σ = 2005560. Its totient is φ = 356512.

The previous prime is 891311. The next prime is 891323. The reversal of 891320 is 23198.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891323) by changing a digit.

891320 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11102 + ... + 11181.

2⁸⁹¹³²⁰ is an apocalyptic number.

It is an amenable number.

891320 is an abundant number, since it is smaller than the sum of its proper divisors (1114240).

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

891320 is a wasteful number, since it uses less digits than its factorization.

891320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22294 (or 22290 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 891320 is about 944.0974525969. The cubic root of 891320 is about 96.2375482852.

The spelling of 891320 in words is "eight hundred ninety-one thousand, three hundred twenty".