648804 has 24 divisors (see below), whose sum is σ = 1630720. Its totient is φ = 199584.

The previous prime is 648803. The next prime is 648841. The reversal of 648804 is 408846.

648804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (648803) 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, 1924 + ... + 2235.

2⁶⁴⁸⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

648804 is an abundant number, since it is smaller than the sum of its proper divisors (981916).

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

648804 is a wasteful number, since it uses less digits than its factorization.

648804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4179 (or 4177 counting only the distinct ones).

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

The square root of 648804 is about 805.4837056080. The cubic root of 648804 is about 86.5707485830.

The spelling of 648804 in words is "six hundred forty-eight thousand, eight hundred four".