856877828 has 24 divisors (see below), whose sum is σ = 1515713472. Its totient is φ = 423828704.

The previous prime is 856877803. The next prime is 856877837. The reversal of 856877828 is 828778658.

It is a super-2 number, since 2×856877828² = 1468479224235995168, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522626 + ... + 524262.

It is an arithmetic number, because the mean of its divisors is an integer number (63154728).

Almost surely, 2^856877828 is an apocalyptic number.

It is an amenable number.

856877828 is a deficient number, since it is larger than the sum of its proper divisors (658835644).

856877828 is a wasteful number, since it uses less digits than its factorization.

856877828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2971 (or 2969 counting only the distinct ones).

The product of its digits is 12042240, while the sum is 59.

The square root of 856877828 is about 29272.4756042259. The cubic root of 856877828 is about 949.8163367939.

The spelling of 856877828 in words is "eight hundred fifty-six million, eight hundred seventy-seven thousand, eight hundred twenty-eight".