648728312 has 16 divisors (see below), whose sum is σ = 1216636200. Its totient is φ = 324292000.

The previous prime is 648728309. The next prime is 648728323. The reversal of 648728312 is 213827846.

It is a self number, because there is not a number n which added to its sum of digits gives 648728312.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 63239 + ... + 72777.

Almost surely, 2^648728312 is an apocalyptic number.

It is an amenable number.

648728312 is a deficient number, since it is larger than the sum of its proper divisors (567907888).

648728312 is a wasteful number, since it uses less digits than its factorization.

648728312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18046 (or 18042 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The square root of 648728312 is about 25470.1455040995. The cubic root of 648728312 is about 865.6738206979.

The spelling of 648728312 in words is "six hundred forty-eight million, seven hundred twenty-eight thousand, three hundred twelve".