891556 has 12 divisors (see below), whose sum is σ = 1642480. Its totient is φ = 422280.

The previous prime is 891551. The next prime is 891557. The reversal of 891556 is 655198.

891556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×891556² = 1589744202272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (891551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5790 + ... + 5941.

2⁸⁹¹⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

891556 is a deficient number, since it is larger than the sum of its proper divisors (750924).

891556 is a wasteful number, since it uses less digits than its factorization.

891556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11754 (or 11752 counting only the distinct ones).

The product of its digits is 10800, while the sum is 34.

The square root of 891556 is about 944.2224314217. Note that the first 3 decimals coincide. The cubic root of 891556 is about 96.2460413282.

The spelling of 891556 in words is "eight hundred ninety-one thousand, five hundred fifty-six".