647224 has 16 divisors (see below), whose sum is σ = 1285200. Its totient is φ = 304512.

The previous prime is 647219. The next prime is 647261. The reversal of 647224 is 422746.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2244 + ... + 2515.

It is an arithmetic number, because the mean of its divisors is an integer number (80325).

2⁶⁴⁷²²⁴ is an apocalyptic number.

It is an amenable number.

647224 is a deficient number, since it is larger than the sum of its proper divisors (637976).

647224 is a wasteful number, since it uses less digits than its factorization.

647224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4782 (or 4778 counting only the distinct ones).

The product of its digits is 2688, while the sum is 25.

The square root of 647224 is about 804.5023306368. The cubic root of 647224 is about 86.5004176531.

The spelling of 647224 in words is "six hundred forty-seven thousand, two hundred twenty-four".