648858 has 24 divisors (see below), whose sum is σ = 1510272. Its totient is φ = 185304.

The previous prime is 648841. The next prime is 648859. The reversal of 648858 is 858846.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648858.

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

648858 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 810 + ... + 1397.

It is an arithmetic number, because the mean of its divisors is an integer number (62928).

2⁶⁴⁸⁸⁵⁸ is an apocalyptic number.

648858 is an abundant number, since it is smaller than the sum of its proper divisors (861414).

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

648858 is a wasteful number, since it uses less digits than its factorization.

648858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226 (or 2219 counting only the distinct ones).

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

The square root of 648858 is about 805.5172251417. The cubic root of 648858 is about 86.5731502794.

The spelling of 648858 in words is "six hundred forty-eight thousand, eight hundred fifty-eight".