648544 has 24 divisors (see below), whose sum is σ = 1375920. Its totient is φ = 299136.

The previous prime is 648509. The next prime is 648563. The reversal of 648544 is 445846.

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, 364 + ... + 1195.

It is an arithmetic number, because the mean of its divisors is an integer number (57330).

2⁶⁴⁸⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

648544 is an abundant number, since it is smaller than the sum of its proper divisors (727376).

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

648544 is a wasteful number, since it uses less digits than its factorization.

648544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582 (or 1574 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

The square root of 648544 is about 805.3222957301. The cubic root of 648544 is about 86.5591829936.

The spelling of 648544 in words is "six hundred forty-eight thousand, five hundred forty-four".