648436752 has 200 divisors, whose sum is σ = 1976927040. Its totient is φ = 205752960.

The previous prime is 648436751. The next prime is 648436759. The reversal of 648436752 is 257634846.

Its product of digits (967680) is a multiple of the sum of its prime divisors (105).

It is a junction number, because it is equal to n+sod(n) for n = 648436698 and 648436707.

It is not an unprimeable number, because it can be changed into a prime (648436751) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9132877 + ... + 9132947.

Almost surely, 2^648436752 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 648436752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (988463520).

648436752 is an abundant number, since it is smaller than the sum of its proper divisors (1328490288).

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

648436752 is an frugal number, since it uses more digits than its factorization.

648436752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 105 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The square root of 648436752 is about 25464.4212971746. The cubic root of 648436752 is about 865.5441137642.

The spelling of 648436752 in words is "six hundred forty-eight million, four hundred thirty-six thousand, seven hundred fifty-two".