648424 has 16 divisors (see below), whose sum is σ = 1389600. Its totient is φ = 277872.

The previous prime is 648391. The next prime is 648433. The reversal of 648424 is 424846.

648424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 648392 and 648401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5734 + ... + 5845.

It is an arithmetic number, because the mean of its divisors is an integer number (86850).

2⁶⁴⁸⁴²⁴ is an apocalyptic number.

It is an amenable number.

648424 is an abundant number, since it is smaller than the sum of its proper divisors (741176).

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

648424 is a wasteful number, since it uses less digits than its factorization.

648424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11592 (or 11588 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

The square root of 648424 is about 805.2477879510. The cubic root of 648424 is about 86.5538439867.

It can be divided in two parts, 64842 and 4, that added together give a palindrome (64846).

The spelling of 648424 in words is "six hundred forty-eight thousand, four hundred twenty-four".