648855 has 12 divisors (see below), whose sum is σ = 1124760. Its totient is φ = 346032.

The previous prime is 648841. The next prime is 648859. The reversal of 648855 is 558846.

It is a happy number.

648855 is a `hidden beast` number, since 648 + 8 + 5 + 5 = 666.

It is not a de Polignac number, because 648855 - 2⁹ = 648343 is a prime.

It is a super-2 number, since 2×648855² = 842025622050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7165 + ... + 7254.

It is an arithmetic number, because the mean of its divisors is an integer number (93730).

2⁶⁴⁸⁸⁵⁵ is an apocalyptic number.

648855 is a deficient number, since it is larger than the sum of its proper divisors (475905).

648855 is a wasteful number, since it uses less digits than its factorization.

648855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14430 (or 14427 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 648855 is about 805.5153629820. The cubic root of 648855 is about 86.5730168553.

Subtracting from 648855 its reverse (558846), we obtain a palindrome (90009).

The spelling of 648855 in words is "six hundred forty-eight thousand, eight hundred fifty-five".