856536 has 32 divisors (see below), whose sum is σ = 2170800. Its totient is φ = 281600.

The previous prime is 856529. The next prime is 856547. The reversal of 856536 is 635658.

It is a junction number, because it is equal to n+sod(n) for n = 856497 and 856506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1936 + ... + 2336.

2⁸⁵⁶⁵³⁶ is an apocalyptic number.

It is an amenable number.

856536 is an abundant number, since it is smaller than the sum of its proper divisors (1314264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856536 is a wasteful number, since it uses less digits than its factorization.

856536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499 (or 495 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 856536 is about 925.4923014267. The cubic root of 856536 is about 94.9690018902.

The spelling of 856536 in words is "eight hundred fifty-six thousand, five hundred thirty-six".