856703306 has 4 divisors (see below), whose sum is σ = 1285054962. Its totient is φ = 428351652.

The previous prime is 856703273. The next prime is 856703347. The reversal of 856703306 is 603307658.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 807071281 + 49632025 = 28409^2 + 7045^2 .

It is a super-2 number, since 2×856703306² = 1467881109022659272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 856703306.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214175825 + ... + 214175828.

Almost surely, 2^856703306 is an apocalyptic number.

856703306 is a deficient number, since it is larger than the sum of its proper divisors (428351656).

856703306 is a wasteful number, since it uses less digits than its factorization.

856703306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428351655.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 856703306 is about 29269.4944609571. The cubic root of 856703306 is about 949.7518487590.

The spelling of 856703306 in words is "eight hundred fifty-six million, seven hundred three thousand, three hundred six".