6438845 has 24 divisors (see below), whose sum is σ = 9221688. Its totient is φ = 4300800.

The previous prime is 6438833. The next prime is 6438871. The reversal of 6438845 is 5488346.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 470596 + 5968249 = 686^2 + 2443^2 .

It is not a de Polignac number, because 6438845 - 2⁴ = 6438829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6438799 and 6438808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9725 + ... + 10365.

It is an arithmetic number, because the mean of its divisors is an integer number (384237).

Almost surely, 2^6438845 is an apocalyptic number.

It is an amenable number.

6438845 is a deficient number, since it is larger than the sum of its proper divisors (2782843).

6438845 is a wasteful number, since it uses less digits than its factorization.

6438845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701 (or 694 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 6438845 is about 2537.4879310058. The cubic root of 6438845 is about 186.0384261766.

The spelling of 6438845 in words is "six million, four hundred thirty-eight thousand, eight hundred forty-five".