856284407 has 16 divisors (see below), whose sum is σ = 990208800. Its totient is φ = 731811840.

The previous prime is 856284367. The next prime is 856284409. The reversal of 856284407 is 704482658.

It is a cyclic number.

It is not a de Polignac number, because 856284407 - 2¹² = 856280311 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 (856284409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205319 + ... + 209447.

It is an arithmetic number, because the mean of its divisors is an integer number (61888050).

Almost surely, 2^856284407 is an apocalyptic number.

856284407 is a deficient number, since it is larger than the sum of its proper divisors (133924393).

856284407 is a wasteful number, since it uses less digits than its factorization.

856284407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5266.

The product of its (nonzero) digits is 430080, while the sum is 44.

The square root of 856284407 is about 29262.3376885716. The cubic root of 856284407 is about 949.5970246561.

The spelling of 856284407 in words is "eight hundred fifty-six million, two hundred eighty-four thousand, four hundred seven".