6396445 has 16 divisors (see below), whose sum is σ = 8815680. Its totient is φ = 4406400.

The previous prime is 6396433. The next prime is 6396463. The reversal of 6396445 is 5446936.

It is a happy number.

It is not a de Polignac number, because 6396445 - 2¹³ = 6388253 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2016 + ... + 4105.

It is an arithmetic number, because the mean of its divisors is an integer number (550980).

Almost surely, 2^6396445 is an apocalyptic number.

It is an amenable number.

6396445 is a deficient number, since it is larger than the sum of its proper divisors (2419235).

6396445 is a wasteful number, since it uses less digits than its factorization.

6396445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6156.

The product of its digits is 77760, while the sum is 37.

The square root of 6396445 is about 2529.1194119693. The cubic root of 6396445 is about 185.6291702102.

It can be divided in two parts, 63964 and 45, that added together give a square (64009 = 253²).

The spelling of 6396445 in words is "six million, three hundred ninety-six thousand, four hundred forty-five".