648218 has 8 divisors (see below), whose sum is σ = 982260. Its totient is φ = 320800.

The previous prime is 648217. The next prime is 648229. The reversal of 648218 is 812846.

It can be written as a sum of positive squares in 2 ways, for example, as 582169 + 66049 = 763^2 + 257^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (648211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1403 + ... + 1806.

2⁶⁴⁸²¹⁸ is an apocalyptic number.

648218 is a deficient number, since it is larger than the sum of its proper divisors (334042).

648218 is a wasteful number, since it uses less digits than its factorization.

648218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3312.

The product of its digits is 3072, while the sum is 29.

The square root of 648218 is about 805.1198668521. The cubic root of 648218 is about 86.5446771553.

The spelling of 648218 in words is "six hundred forty-eight thousand, two hundred eighteen".