648456772 has 24 divisors (see below), whose sum is σ = 1206568440. Its totient is φ = 303882240.

The previous prime is 648456713. The next prime is 648456773. The reversal of 648456772 is 277654846.

It can be written as a sum of positive squares in 4 ways, for example, as 289884676 + 358572096 = 17026^2 + 18936^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (648456773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3397 + ... + 36172.

It is an arithmetic number, because the mean of its divisors is an integer number (50273685).

Almost surely, 2^648456772 is an apocalyptic number.

It is an amenable number.

648456772 is a deficient number, since it is larger than the sum of its proper divisors (558111668).

648456772 is a wasteful number, since it uses less digits than its factorization.

648456772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39831 (or 39829 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 49.

The square root of 648456772 is about 25464.8143916267. The cubic root of 648456772 is about 865.5530213484.

It can be divided in two parts, 64845 and 6772, that added together give a palindrome (71617).

The spelling of 648456772 in words is "six hundred forty-eight million, four hundred fifty-six thousand, seven hundred seventy-two".