6439224 has 32 divisors (see below), whose sum is σ = 17562240. Its totient is φ = 1951200.

The previous prime is 6439219. The next prime is 6439259. The reversal of 6439224 is 4229346.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 6439191 and 6439200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11932 + ... + 12459.

It is an arithmetic number, because the mean of its divisors is an integer number (548820).

Almost surely, 2^6439224 is an apocalyptic number.

It is an amenable number.

6439224 is an abundant number, since it is smaller than the sum of its proper divisors (11123016).

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

6439224 is a wasteful number, since it uses less digits than its factorization.

6439224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24411 (or 24407 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 6439224 is about 2537.5626100650. The cubic root of 6439224 is about 186.0420762712.

The spelling of 6439224 in words is "six million, four hundred thirty-nine thousand, two hundred twenty-four".