856396827 has 32 divisors (see below), whose sum is σ = 1490549760. Its totient is φ = 479100960.

The previous prime is 856396819. The next prime is 856396831. The reversal of 856396827 is 728693658.

It is a happy number.

It is not a de Polignac number, because 856396827 - 2³ = 856396819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (856396867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107043 + ... + 114764.

It is an arithmetic number, because the mean of its divisors is an integer number (46579680).

Almost surely, 2^856396827 is an apocalyptic number.

856396827 is a deficient number, since it is larger than the sum of its proper divisors (634152933).

856396827 is a wasteful number, since it uses less digits than its factorization.

856396827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221840 (or 221834 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 856396827 is about 29264.2585246919. The cubic root of 856396827 is about 949.6385797847.

The spelling of 856396827 in words is "eight hundred fifty-six million, three hundred ninety-six thousand, eight hundred twenty-seven".