856464 has 40 divisors (see below), whose sum is σ = 2529600. Its totient is φ = 244608.

The previous prime is 856459. The next prime is 856469. The reversal of 856464 is 464658.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (856459) and next prime (856469).

It is not an unprimeable number, because it can be changed into a prime (856469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 939 + ... + 1610.

It is an arithmetic number, because the mean of its divisors is an integer number (63240).

2⁸⁵⁶⁴⁶⁴ is an apocalyptic number.

856464 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

856464 is an abundant number, since it is smaller than the sum of its proper divisors (1673136).

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

856464 is a wasteful number, since it uses less digits than its factorization.

856464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567 (or 2561 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 856464 is about 925.4534023926. The cubic root of 856464 is about 94.9663407996.

The spelling of 856464 in words is "eight hundred fifty-six thousand, four hundred sixty-four".