6426644 has 18 divisors (see below), whose sum is σ = 13083210. Its totient is φ = 2754192.

The previous prime is 6426631. The next prime is 6426653. The reversal of 6426644 is 4466246.

It can be written as a sum of positive squares in only one way, i.e., 5466244 + 960400 = 2338^2 + 980^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6426644.

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, 16199 + ... + 16590.

It is an arithmetic number, because the mean of its divisors is an integer number (726845).

Almost surely, 2^6426644 is an apocalyptic number.

It is an amenable number.

6426644 is an abundant number, since it is smaller than the sum of its proper divisors (6656566).

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

6426644 is a wasteful number, since it uses less digits than its factorization.

6426644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32807 (or 32798 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

The square root of 6426644 is about 2535.0826416510. The cubic root of 6426644 is about 185.9208434906.

The spelling of 6426644 in words is "six million, four hundred twenty-six thousand, six hundred forty-four".