856497100 has 72 divisors (see below), whose sum is σ = 1903003200. Its totient is φ = 334497600.

The previous prime is 856497079. The next prime is 856497133. The reversal of 856497100 is 1794658.

856497100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1055695 + ... + 1056505.

It is an arithmetic number, because the mean of its divisors is an integer number (26430600).

Almost surely, 2^856497100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856497100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (951501600).

856497100 is an abundant number, since it is smaller than the sum of its proper divisors (1046506100).

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

856497100 is a wasteful number, since it uses less digits than its factorization.

856497100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063 (or 1056 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 856497100 is about 29265.9717077701. The cubic root of 856497100 is about 949.6756418063.

The spelling of 856497100 in words is "eight hundred fifty-six million, four hundred ninety-seven thousand, one hundred".