648880 has 20 divisors (see below), whose sum is σ = 1508832. Its totient is φ = 259520.

The previous prime is 648871. The next prime is 648887. The reversal of 648880 is 88846.

648880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (648887) by changing a digit.

648880 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 3 ways as a sum of consecutive naturals, for example, 3976 + ... + 4135.

2⁶⁴⁸⁸⁸⁰ is an apocalyptic number.

It is an amenable number.

648880 is an abundant number, since it is smaller than the sum of its proper divisors (859952).

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

648880 is a wasteful number, since it uses less digits than its factorization.

648880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8124 (or 8118 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 648880 is about 805.5308808482. The cubic root of 648880 is about 86.5741287101.

Subtracting from 648880 its sum of digits (34), we obtain a palindrome (648846).

The spelling of 648880 in words is "six hundred forty-eight thousand, eight hundred eighty".