648858900 has 72 divisors (see below), whose sum is σ = 1887066720. Its totient is φ = 172135040.

The previous prime is 648858871. The next prime is 648858901. The reversal of 648858900 is 9858846.

It is a self number, because there is not a number n which added to its sum of digits gives 648858900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648858901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53611 + ... + 64589.

It is an arithmetic number, because the mean of its divisors is an integer number (26209260).

Almost surely, 2^648858900 is an apocalyptic number.

648858900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648858900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943533360).

648858900 is an abundant number, since it is smaller than the sum of its proper divisors (1238207820).

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

648858900 is a wasteful number, since it uses less digits than its factorization.

648858900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11193 (or 11186 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The square root of 648858900 is about 25472.7089254363. The cubic root of 648858900 is about 865.7319030652.

The spelling of 648858900 in words is "six hundred forty-eight million, eight hundred fifty-eight thousand, nine hundred".