648290 has 16 divisors (see below), whose sum is σ = 1176120. Its totient is φ = 257280.

The previous prime is 648289. The next prime is 648293. The reversal of 648290 is 92846.

It can be written as a sum of positive squares in 4 ways, for example, as 444889 + 203401 = 667^2 + 451^2 .

It is not an unprimeable number, because it can be changed into a prime (648293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2276 + ... + 2544.

2⁶⁴⁸²⁹⁰ is an apocalyptic number.

648290 is a deficient number, since it is larger than the sum of its proper divisors (527830).

648290 is a wasteful number, since it uses less digits than its factorization.

648290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 648290 is about 805.1645794494. The cubic root of 648290 is about 86.5478813171.

The spelling of 648290 in words is "six hundred forty-eight thousand, two hundred ninety".