856280868 has 48 divisors (see below), whose sum is σ = 2017935360. Its totient is φ = 282592800.

The previous prime is 856280861. The next prime is 856280927. The reversal of 856280868 is 868082658.

It is a self number, because there is not a number n which added to its sum of digits gives 856280868.

It is not an unprimeable number, because it can be changed into a prime (856280861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581373 + ... + 582843.

It is an arithmetic number, because the mean of its divisors is an integer number (42040320).

Almost surely, 2^856280868 is an apocalyptic number.

It is an amenable number.

856280868 is an abundant number, since it is smaller than the sum of its proper divisors (1161654492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856280868 is a wasteful number, since it uses less digits than its factorization.

856280868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928 (or 1926 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 51.

The square root of 856280868 is about 29262.2772182891. The cubic root of 856280868 is about 949.5957164348.

The spelling of 856280868 in words is "eight hundred fifty-six million, two hundred eighty thousand, eight hundred sixty-eight".