6423644 has 12 divisors (see below), whose sum is σ = 11545464. Its totient is φ = 3124944.

The previous prime is 6423643. The next prime is 6423649. The reversal of 6423644 is 4463246.

It is a happy number.

6423644 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 not an unprimeable number, because it can be changed into a prime (6423643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21554 + ... + 21849.

It is an arithmetic number, because the mean of its divisors is an integer number (962122).

Almost surely, 2^6423644 is an apocalyptic number.

It is an amenable number.

6423644 is a deficient number, since it is larger than the sum of its proper divisors (5121820).

6423644 is a wasteful number, since it uses less digits than its factorization.

6423644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43444 (or 43442 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

The square root of 6423644 is about 2534.4908758960. The cubic root of 6423644 is about 185.8919092941.

The spelling of 6423644 in words is "six million, four hundred twenty-three thousand, six hundred forty-four".