856434 has 16 divisors (see below), whose sum is σ = 1749888. Its totient is φ = 279312.

The previous prime is 856421. The next prime is 856441. The reversal of 856434 is 434658.

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, 1237 + ... + 1800.

It is an arithmetic number, because the mean of its divisors is an integer number (109368).

2⁸⁵⁶⁴³⁴ is an apocalyptic number.

856434 is an abundant number, since it is smaller than the sum of its proper divisors (893454).

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

856434 is a wasteful number, since it uses less digits than its factorization.

856434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3089.

The product of its digits is 11520, while the sum is 30.

The square root of 856434 is about 925.4371939791. The cubic root of 856434 is about 94.9652319678.

The spelling of 856434 in words is "eight hundred fifty-six thousand, four hundred thirty-four".