856949228 has 12 divisors (see below), whose sum is σ = 1524246192. Its totient is φ = 421450320.

The previous prime is 856949201. The next prime is 856949231. The reversal of 856949228 is 822949658.

It is a self number, because there is not a number n which added to its sum of digits gives 856949228.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1755800 + ... + 1756287.

It is an arithmetic number, because the mean of its divisors is an integer number (127020516).

Almost surely, 2^856949228 is an apocalyptic number.

It is an amenable number.

856949228 is a deficient number, since it is larger than the sum of its proper divisors (667296964).

856949228 is a wasteful number, since it uses less digits than its factorization.

856949228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512152 (or 3512150 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 53.

The square root of 856949228 is about 29273.6951545240. The cubic root of 856949228 is about 949.8427174520.

The spelling of 856949228 in words is "eight hundred fifty-six million, nine hundred forty-nine thousand, two hundred twenty-eight".