856627820 has 48 divisors (see below), whose sum is σ = 1819540800. Its totient is φ = 338747136.

The previous prime is 856627813. The next prime is 856627823. The reversal of 856627820 is 28726658.

856627820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×856627820² = 1467622443995904800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (856627823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 783194 + ... + 784286.

It is an arithmetic number, because the mean of its divisors is an integer number (37907100).

Almost surely, 2^856627820 is an apocalyptic number.

It is an amenable number.

856627820 is an abundant number, since it is smaller than the sum of its proper divisors (962912980).

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

856627820 is a wasteful number, since it uses less digits than its factorization.

856627820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514 (or 1512 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 856627820 is about 29268.2049329985. The cubic root of 856627820 is about 949.7239530362.

The spelling of 856627820 in words is "eight hundred fifty-six million, six hundred twenty-seven thousand, eight hundred twenty".