856867800 has 48 divisors (see below), whose sum is σ = 2656292040. Its totient is φ = 228497920.

The previous prime is 856867787. The next prime is 856867811. The reversal of 856867800 is 8768658.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 856867800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 713457 + ... + 714656.

Almost surely, 2^856867800 is an apocalyptic number.

It is an amenable number.

856867800 is an abundant number, since it is smaller than the sum of its proper divisors (1799424240).

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

856867800 is a wasteful number, since it uses less digits than its factorization.

856867800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428132 (or 1428123 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 856867800 is about 29272.3043165378. The cubic root of 856867800 is about 949.8126315612.

The spelling of 856867800 in words is "eight hundred fifty-six million, eight hundred sixty-seven thousand, eight hundred".