856628 has 12 divisors (see below), whose sum is σ = 1505952. Its totient is φ = 426360.

The previous prime is 856627. The next prime is 856637. The reversal of 856628 is 826658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856627) 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, 1001 + ... + 1647.

It is an arithmetic number, because the mean of its divisors is an integer number (125496).

2⁸⁵⁶⁶²⁸ is an apocalyptic number.

It is an amenable number.

856628 is a deficient number, since it is larger than the sum of its proper divisors (649324).

856628 is a wasteful number, since it uses less digits than its factorization.

856628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982 (or 980 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 856628 is about 925.5420033688. The cubic root of 856628 is about 94.9724019557.

The spelling of 856628 in words is "eight hundred fifty-six thousand, six hundred twenty-eight".