856305444 has 12 divisors (see below), whose sum is σ = 1998046064. Its totient is φ = 285435144.

The previous prime is 856305383. The next prime is 856305449. The reversal of 856305444 is 444503658.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (856305449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35679382 + ... + 35679405.

Almost surely, 2^856305444 is an apocalyptic number.

It is an amenable number.

856305444 is an abundant number, since it is smaller than the sum of its proper divisors (1141740620).

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

856305444 is a wasteful number, since it uses less digits than its factorization.

856305444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71358794 (or 71358792 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 39.

The square root of 856305444 is about 29262.6971415828. The cubic root of 856305444 is about 949.6048010868.

The spelling of 856305444 in words is "eight hundred fifty-six million, three hundred five thousand, four hundred forty-four".