856416020 has 24 divisors (see below), whose sum is σ = 1801784544. Its totient is φ = 341935776.

The previous prime is 856416019. The next prime is 856416031. The reversal of 856416020 is 20614658.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28202 + ... + 50081.

It is an arithmetic number, because the mean of its divisors is an integer number (75074356).

Almost surely, 2^856416020 is an apocalyptic number.

It is an amenable number.

856416020 is an abundant number, since it is smaller than the sum of its proper divisors (945368524).

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

856416020 is a wasteful number, since it uses less digits than its factorization.

856416020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78839 (or 78837 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 856416020 is about 29264.5864484704. The cubic root of 856416020 is about 949.6456739559.

The spelling of 856416020 in words is "eight hundred fifty-six million, four hundred sixteen thousand, twenty".