891628 has 12 divisors (see below), whose sum is σ = 1576512. Its totient is φ = 441200.

The previous prime is 891617. The next prime is 891629. The reversal of 891628 is 826198.

It is a junction number, because it is equal to n+sod(n) for n = 891593 and 891602.

It is not an unprimeable number, because it can be changed into a prime (891629) 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, 700 + ... + 1507.

It is an arithmetic number, because the mean of its divisors is an integer number (131376).

2⁸⁹¹⁶²⁸ is an apocalyptic number.

It is an amenable number.

891628 is a deficient number, since it is larger than the sum of its proper divisors (684884).

891628 is a wasteful number, since it uses less digits than its factorization.

891628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2312 (or 2310 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 891628 is about 944.2605572616. The cubic root of 891628 is about 96.2486321276.

The spelling of 891628 in words is "eight hundred ninety-one thousand, six hundred twenty-eight".