856486020 has 96 divisors (see below), whose sum is σ = 2596608000. Its totient is φ = 209687040.

The previous prime is 856486019. The next prime is 856486031. The reversal of 856486020 is 20684658.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 856486020.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146106 + ... + 151854.

It is an arithmetic number, because the mean of its divisors is an integer number (27048000).

Almost surely, 2^856486020 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 856486020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1298304000).

856486020 is an abundant number, since it is smaller than the sum of its proper divisors (1740121980).

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

856486020 is a wasteful number, since it uses less digits than its factorization.

856486020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5965 (or 5963 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 856486020 is about 29265.7824088132. The cubic root of 856486020 is about 949.6715466566.

The spelling of 856486020 in words is "eight hundred fifty-six million, four hundred eighty-six thousand, twenty".