6445312 has 36 divisors (see below), whose sum is σ = 13631436. Its totient is φ = 3031040.

The previous prime is 6445259. The next prime is 6445319. The reversal of 6445312 is 2135446.

It can be written as a sum of positive squares in 2 ways, for example, as 3936256 + 2509056 = 1984^2 + 1584^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3612 + ... + 5092.

It is an arithmetic number, because the mean of its divisors is an integer number (378651).

Almost surely, 2^6445312 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 6445312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6815718).

6445312 is an abundant number, since it is smaller than the sum of its proper divisors (7186124).

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

6445312 is a wasteful number, since it uses less digits than its factorization.

6445312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514 (or 1500 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 6445312 is about 2538.7619029755. The cubic root of 6445312 is about 186.1006893069.

The spelling of 6445312 in words is "six million, four hundred forty-five thousand, three hundred twelve".