856229445 has 24 divisors (see below), whose sum is σ = 1520332632. Its totient is φ = 445516800.

The previous prime is 856229443. The next prime is 856229449. The reversal of 856229445 is 544922658.

It can be written as a sum of positive squares in 4 ways, for example, as 113230881 + 742998564 = 10641^2 + 27258^2 .

It is not a de Polignac number, because 856229445 - 2¹ = 856229443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 856229445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856229443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 230196 + ... + 233885.

It is an arithmetic number, because the mean of its divisors is an integer number (63347193).

Almost surely, 2^856229445 is an apocalyptic number.

It is an amenable number.

856229445 is a deficient number, since it is larger than the sum of its proper divisors (664103187).

856229445 is a wasteful number, since it uses less digits than its factorization.

856229445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464133 (or 464130 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 856229445 is about 29261.3985482581. The cubic root of 856229445 is about 949.5767070810.

The spelling of 856229445 in words is "eight hundred fifty-six million, two hundred twenty-nine thousand, four hundred forty-five".