856630 has 16 divisors (see below), whose sum is σ = 1632960. Its totient is φ = 322432.

The previous prime is 856627. The next prime is 856637. The reversal of 856630 is 36658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2350 + ... + 2689.

It is an arithmetic number, because the mean of its divisors is an integer number (102060).

2⁸⁵⁶⁶³⁰ is an apocalyptic number.

856630 is a deficient number, since it is larger than the sum of its proper divisors (776330).

856630 is a wasteful number, since it uses less digits than its factorization.

856630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5063.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 856630 is about 925.5430838162. The cubic root of 856630 is about 94.9724758674.

Adding to 856630 its sum of digits (28), we get a palindrome (856658).

The spelling of 856630 in words is "eight hundred fifty-six thousand, six hundred thirty".