856722986 has 16 divisors (see below), whose sum is σ = 1470756480. Its totient is φ = 366644880.

The previous prime is 856722983. The next prime is 856723001. The reversal of 856722986 is 689227658.

It is not an unprimeable number, because it can be changed into a prime (856722983) 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, 33230 + ... + 53081.

It is an arithmetic number, because the mean of its divisors is an integer number (91922280).

Almost surely, 2^856722986 is an apocalyptic number.

856722986 is a deficient number, since it is larger than the sum of its proper divisors (614033494).

856722986 is a wasteful number, since it uses less digits than its factorization.

856722986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87029.

The product of its digits is 2903040, while the sum is 53.

The square root of 856722986 is about 29269.8306452224. The cubic root of 856722986 is about 949.7591212002.

The spelling of 856722986 in words is "eight hundred fifty-six million, seven hundred twenty-two thousand, nine hundred eighty-six".