647344 has 10 divisors (see below), whose sum is σ = 1254260. Its totient is φ = 323664.

The previous prime is 647341. The next prime is 647357. The reversal of 647344 is 443746.

It is not an unprimeable number, because it can be changed into a prime (647341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20214 + ... + 20245.

It is an arithmetic number, because the mean of its divisors is an integer number (125426).

2⁶⁴⁷³⁴⁴ is an apocalyptic number.

It is an amenable number.

647344 is a deficient number, since it is larger than the sum of its proper divisors (606916).

647344 is a wasteful number, since it uses less digits than its factorization.

647344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40467 (or 40461 counting only the distinct ones).

The product of its digits is 8064, while the sum is 28.

The square root of 647344 is about 804.5769074489. The cubic root of 647344 is about 86.5057632566.

The spelling of 647344 in words is "six hundred forty-seven thousand, three hundred forty-four".