6436944 has 30 divisors (see below), whose sum is σ = 18014906. Its totient is φ = 2145600.

The previous prime is 6436939. The next prime is 6436973. The reversal of 6436944 is 4496346.

6436944 is a `hidden beast` number, since 643 + 6 + 9 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3240000 + 3196944 = 1800^2 + 1788^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 6436899 and 6436908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22207 + ... + 22494.

Almost surely, 2^6436944 is an apocalyptic number.

It is an amenable number.

6436944 is an abundant number, since it is smaller than the sum of its proper divisors (11577962).

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

6436944 is a wasteful number, since it uses less digits than its factorization.

6436944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44715 (or 44706 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 6436944 is about 2537.1133202914. The cubic root of 6436944 is about 186.0201157571.

Subtracting from 6436944 its product of digits (62208), we obtain a palindrome (6374736).

The spelling of 6436944 in words is "six million, four hundred thirty-six thousand, nine hundred forty-four".