856878484 has 60 divisors (see below), whose sum is σ = 1908623808. Its totient is φ = 333807600.

The previous prime is 856878443. The next prime is 856878487. The reversal of 856878484 is 484878658.

856878484 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856878487) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 101589 + ... + 109699.

Almost surely, 2^856878484 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 856878484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (954311904).

856878484 is an abundant number, since it is smaller than the sum of its proper divisors (1051745324).

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

856878484 is a wasteful number, since it uses less digits than its factorization.

856878484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8154 (or 8131 counting only the distinct ones).

The product of its digits is 13762560, while the sum is 58.

The square root of 856878484 is about 29272.4868092890. The cubic root of 856878484 is about 949.8165791775.

The spelling of 856878484 in words is "eight hundred fifty-six million, eight hundred seventy-eight thousand, four hundred eighty-four".