648344 has 8 divisors (see below), whose sum is σ = 1215660. Its totient is φ = 324168.

The previous prime is 648343. The next prime is 648371. The reversal of 648344 is 443846.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648344.

It is not an unprimeable number, because it can be changed into a prime (648341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40514 + ... + 40529.

2⁶⁴⁸³⁴⁴ is an apocalyptic number.

It is an amenable number.

648344 is a deficient number, since it is larger than the sum of its proper divisors (567316).

648344 is a wasteful number, since it uses less digits than its factorization.

648344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81049 (or 81045 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

The square root of 648344 is about 805.1981122680. The cubic root of 648344 is about 86.5502842828.

The spelling of 648344 in words is "six hundred forty-eight thousand, three hundred forty-four".