648352896 has 128 divisors (see below), whose sum is σ = 1775779200. Its totient is φ = 209510400.

The previous prime is 648352891. The next prime is 648352909. The reversal of 648352896 is 698253846.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×648352896² = 840722955503173632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (648352891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2084581 + ... + 2084891.

It is an arithmetic number, because the mean of its divisors is an integer number (13873275).

Almost surely, 2^648352896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648352896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (887889600).

648352896 is an abundant number, since it is smaller than the sum of its proper divisors (1127426304).

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

648352896 is a wasteful number, since it uses less digits than its factorization.

648352896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 466 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 51.

The square root of 648352896 is about 25462.7747113310. The cubic root of 648352896 is about 865.5068013633.

The spelling of 648352896 in words is "six hundred forty-eight million, three hundred fifty-two thousand, eight hundred ninety-six".