891656 has 16 divisors (see below), whose sum is σ = 1682640. Its totient is φ = 442960.

The previous prime is 891647. The next prime is 891659. The reversal of 891656 is 656198.

Its product of digits (12960) is a multiple of the sum of its prime divisors (720).

It is not an unprimeable number, because it can be changed into a prime (891659) by changing a digit.

891656 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 3 ways as a sum of consecutive naturals, for example, 1571 + ... + 2061.

It is an arithmetic number, because the mean of its divisors is an integer number (105165).

2⁸⁹¹⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

891656 is a deficient number, since it is larger than the sum of its proper divisors (790984).

891656 is a wasteful number, since it uses less digits than its factorization.

891656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 720 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 891656 is about 944.2753835614. The cubic root of 891656 is about 96.2496396231.

The spelling of 891656 in words is "eight hundred ninety-one thousand, six hundred fifty-six".