6446636 has 36 divisors (see below), whose sum is σ = 13559616. Its totient is φ = 2671200.

The previous prime is 6446633. The next prime is 6446651. The reversal of 6446636 is 6366446.

It is a junction number, because it is equal to n+sod(n) for n = 6446596 and 6446605.

It is not an unprimeable number, because it can be changed into a prime (6446633) 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 in 11 ways as a sum of consecutive naturals, for example, 5546 + ... + 6606.

It is an arithmetic number, because the mean of its divisors is an integer number (376656).

Almost surely, 2^6446636 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 6446636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6779808).

6446636 is an abundant number, since it is smaller than the sum of its proper divisors (7112980).

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

6446636 is a wasteful number, since it uses less digits than its factorization.

6446636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110 (or 1101 counting only the distinct ones).

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

The square root of 6446636 is about 2539.0226466103. The cubic root of 6446636 is about 186.1134314076.

The spelling of 6446636 in words is "six million, four hundred forty-six thousand, six hundred thirty-six".