647248 has 20 divisors (see below), whose sum is σ = 1433440. Its totient is φ = 277344.

The previous prime is 647219. The next prime is 647261. The reversal of 647248 is 842746.

It is a congruent number.

It is an unprimeable number.

647248 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2778 + ... + 3001.

It is an arithmetic number, because the mean of its divisors is an integer number (71672).

2⁶⁴⁷²⁴⁸ is an apocalyptic number.

It is an amenable number.

647248 is an abundant number, since it is smaller than the sum of its proper divisors (786192).

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

647248 is a wasteful number, since it uses less digits than its factorization.

647248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5794 (or 5788 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 647248 is about 804.5172465522. The cubic root of 647248 is about 86.5014868267.

The spelling of 647248 in words is "six hundred forty-seven thousand, two hundred forty-eight".