856477 has 8 divisors (see below), whose sum is σ = 919296. Its totient is φ = 795072.

The previous prime is 856469. The next prime is 856483. The reversal of 856477 is 774658.

It is a happy number.

856477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 856477 - 2³ = 856469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856417) 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, 1108 + ... + 1714.

It is an arithmetic number, because the mean of its divisors is an integer number (114912).

2⁸⁵⁶⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

856477 is a deficient number, since it is larger than the sum of its proper divisors (62819).

856477 is a wasteful number, since it uses less digits than its factorization.

856477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707.

The product of its digits is 47040, while the sum is 37.

The square root of 856477 is about 925.4604259502. The cubic root of 856477 is about 94.9668212853.

The spelling of 856477 in words is "eight hundred fifty-six thousand, four hundred seventy-seven".