856704357 has 40 divisors (see below), whose sum is σ = 1359749600. Its totient is φ = 536007456.

The previous prime is 856704323. The next prime is 856704371. The reversal of 856704357 is 753407658.

It is not a de Polignac number, because 856704357 - 2¹¹ = 856702309 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856704377) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 165198 + ... + 170304.

It is an arithmetic number, because the mean of its divisors is an integer number (33993740).

Almost surely, 2^856704357 is an apocalyptic number.

It is an amenable number.

856704357 is a deficient number, since it is larger than the sum of its proper divisors (503045243).

856704357 is a wasteful number, since it uses less digits than its factorization.

856704357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5247 (or 5238 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The square root of 856704357 is about 29269.5124147978. The cubic root of 856704357 is about 949.7522371427.

The spelling of 856704357 in words is "eight hundred fifty-six million, seven hundred four thousand, three hundred fifty-seven".