648228 has 24 divisors (see below), whose sum is σ = 1728832. Its totient is φ = 185184.

The previous prime is 648217. The next prime is 648229. The reversal of 648228 is 822846.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 648195 and 648204.

It is not an unprimeable number, because it can be changed into a prime (648229) by changing a digit.

648228 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3775 + ... + 3942.

2⁶⁴⁸²²⁸ is an apocalyptic number.

It is an amenable number.

648228 is an abundant number, since it is smaller than the sum of its proper divisors (1080604).

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

648228 is a wasteful number, since it uses less digits than its factorization.

648228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7731 (or 7729 counting only the distinct ones).

The product of its digits is 6144, while the sum is 30.

The square root of 648228 is about 805.1260770836. The cubic root of 648228 is about 86.5451221920.

The spelling of 648228 in words is "six hundred forty-eight thousand, two hundred twenty-eight".