648885 has 16 divisors (see below), whose sum is σ = 1048320. Its totient is φ = 342720.

The previous prime is 648871. The next prime is 648887. The reversal of 648885 is 588846.

It is not a de Polignac number, because 648885 - 2⁸ = 648629 is a prime.

It is a Curzon number.

It is a congruent number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2596 + ... + 2834.

It is an arithmetic number, because the mean of its divisors is an integer number (65520).

2⁶⁴⁸⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

648885 is a deficient number, since it is larger than the sum of its proper divisors (399435).

648885 is a wasteful number, since it uses less digits than its factorization.

648885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

The product of its digits is 61440, while the sum is 39.

The square root of 648885 is about 805.5339843855. The cubic root of 648885 is about 86.5743510776.

Subtracting from 648885 its sum of digits (39), we obtain a palindrome (648846).

The spelling of 648885 in words is "six hundred forty-eight thousand, eight hundred eighty-five".