648702128 has 40 divisors (see below), whose sum is σ = 1288750848. Its totient is φ = 316153152.

The previous prime is 648702127. The next prime is 648702193. The reversal of 648702128 is 821207846.

It is a junction number, because it is equal to n+sod(n) for n = 648702091 and 648702100.

It is not an unprimeable number, because it can be changed into a prime (648702127) 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, 609725 + ... + 610787.

Almost surely, 2^648702128 is an apocalyptic number.

It is an amenable number.

648702128 is a deficient number, since it is larger than the sum of its proper divisors (640048720).

648702128 is a wasteful number, since it uses less digits than its factorization.

648702128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001 (or 1995 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 648702128 is about 25469.6314853592. The cubic root of 648702128 is about 865.6621737532.

The spelling of 648702128 in words is "six hundred forty-eight million, seven hundred two thousand, one hundred twenty-eight".