6436646 has 4 divisors (see below), whose sum is σ = 9654972. Its totient is φ = 3218322.

The previous prime is 6436643. The next prime is 6436657. The reversal of 6436646 is 6466346.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6436643) 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 as a sum of consecutive naturals, namely, 1609160 + ... + 1609163.

It is an arithmetic number, because the mean of its divisors is an integer number (2413743).

Almost surely, 2^6436646 is an apocalyptic number.

6436646 is a deficient number, since it is larger than the sum of its proper divisors (3218326).

6436646 is a wasteful number, since it uses less digits than its factorization.

6436646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218325.

The product of its digits is 62208, while the sum is 35.

The square root of 6436646 is about 2537.0545914505. The cubic root of 6436646 is about 186.0172450962.

The spelling of 6436646 in words is "six million, four hundred thirty-six thousand, six hundred forty-six".