6364644 has 48 divisors (see below), whose sum is σ = 17451840. Its totient is φ = 1779840.

The previous prime is 6364637. The next prime is 6364649. The reversal of 6364644 is 4464636.

It is a Harshad number since it is a multiple of its sum of digits (33).

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

It is not an unprimeable number, because it can be changed into a prime (6364649) 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 15 ways as a sum of consecutive naturals, for example, 139 + ... + 3570.

It is an arithmetic number, because the mean of its divisors is an integer number (363580).

Almost surely, 2^6364644 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 6364644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8725920).

6364644 is an abundant number, since it is smaller than the sum of its proper divisors (11087196).

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

6364644 is a wasteful number, since it uses less digits than its factorization.

6364644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3740 (or 3738 counting only the distinct ones).

The product of its digits is 41472, while the sum is 33.

The square root of 6364644 is about 2522.8246074589. The cubic root of 6364644 is about 185.3210301283.

The spelling of 6364644 in words is "six million, three hundred sixty-four thousand, six hundred forty-four".