856412433 has 28 divisors (see below), whose sum is σ = 1291401360. Its totient is φ = 567665496.

The previous prime is 856412407. The next prime is 856412443. The reversal of 856412433 is 334214658.

856412433 is a `hidden beast` number, since 8 + 5 + 641 + 2 + 4 + 3 + 3 = 666.

It is not a de Polignac number, because 856412433 - 2²⁶ = 789303569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (856412443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 127210 + ... + 133772.

Almost surely, 2^856412433 is an apocalyptic number.

It is an amenable number.

856412433 is a deficient number, since it is larger than the sum of its proper divisors (434988927).

856412433 is an equidigital number, since it uses as much as digits as its factorization.

856412433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6760 (or 6745 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 856412433 is about 29264.5251627290. The cubic root of 856412433 is about 949.6443481269.

The spelling of 856412433 in words is "eight hundred fifty-six million, four hundred twelve thousand, four hundred thirty-three".