648858870 has 96 divisors (see below), whose sum is σ = 1901985120. Its totient is φ = 157291200.

The previous prime is 648858787. The next prime is 648858871. The reversal of 648858870 is 78858846.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648858871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22740 + ... + 42600.

It is an arithmetic number, because the mean of its divisors is an integer number (19812345).

Almost surely, 2^648858870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648858870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (950992560).

648858870 is an abundant number, since it is smaller than the sum of its proper divisors (1253126250).

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

648858870 is a wasteful number, since it uses less digits than its factorization.

648858870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19899 (or 19882 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 54.

The square root of 648858870 is about 25472.7083365707. The cubic root of 648858870 is about 865.7318897228.

The spelling of 648858870 in words is "six hundred forty-eight million, eight hundred fifty-eight thousand, eight hundred seventy".