856470 has 16 divisors (see below), whose sum is σ = 2055600. Its totient is φ = 228384.

The previous prime is 856469. The next prime is 856483. The reversal of 856470 is 74658.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 28549 = 856470 / (8 + 5 + 6 + 4 + 7 + 0).

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, 14245 + ... + 14304.

It is an arithmetic number, because the mean of its divisors is an integer number (128475).

2⁸⁵⁶⁴⁷⁰ is an apocalyptic number.

856470 is an abundant number, since it is smaller than the sum of its proper divisors (1199130).

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

856470 is a wasteful number, since it uses less digits than its factorization.

856470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28559.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 856470 is about 925.4566440412. The cubic root of 856470 is about 94.9665625629.

It can be divided in two parts, 856 and 470, that added together give a triangular number (1326 = T₅₁).

The spelling of 856470 in words is "eight hundred fifty-six thousand, four hundred seventy".