648728311 has 12 divisors (see below), whose sum is σ = 814932496. Its totient is φ = 505501920.

The previous prime is 648728309. The next prime is 648728323. The reversal of 648728311 is 113827846.

It is not a de Polignac number, because 648728311 - 2¹ = 648728309 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648728011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 382110 + ... + 383803.

Almost surely, 2^648728311 is an apocalyptic number.

648728311 is a deficient number, since it is larger than the sum of its proper divisors (166204185).

648728311 is a wasteful number, since it uses less digits than its factorization.

648728311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765942 (or 765931 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 648728311 is about 25470.1454844687. The cubic root of 648728311 is about 865.6738202531.

The spelling of 648728311 in words is "six hundred forty-eight million, seven hundred twenty-eight thousand, three hundred eleven".