6419644 has 48 divisors (see below), whose sum is σ = 14757120. Its totient is φ = 2367360.

The previous prime is 6419629. The next prime is 6419653. The reversal of 6419644 is 4469146.

6419644 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5304 + ... + 6400.

It is an arithmetic number, because the mean of its divisors is an integer number (307440).

Almost surely, 2^6419644 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 6419644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7378560).

6419644 is an abundant number, since it is smaller than the sum of its proper divisors (8337476).

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

6419644 is a wasteful number, since it uses less digits than its factorization.

6419644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138 (or 1136 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 6419644 is about 2533.7016398937. The cubic root of 6419644 is about 185.8533163485.

The spelling of 6419644 in words is "six million, four hundred nineteen thousand, six hundred forty-four".