648866052 has 30 divisors (see below), whose sum is σ = 1696264878. Its totient is φ = 216288576.

The previous prime is 648866033. The next prime is 648866063. The reversal of 648866052 is 250668846.

It can be written as a sum of positive squares in only one way, i.e., 484616196 + 164249856 = 22014^2 + 12816^2 .

It is a junction number, because it is equal to n+sod(n) for n = 648865989 and 648866007.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 1001013 + ... + 1001660.

Almost surely, 2^648866052 is an apocalyptic number.

It is an amenable number.

648866052 is an abundant number, since it is smaller than the sum of its proper divisors (1047398826).

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

648866052 is a wasteful number, since it uses less digits than its factorization.

648866052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002689 (or 2002678 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 648866052 is about 25472.8493105895. The cubic root of 648866052 is about 865.7350838758.

The spelling of 648866052 in words is "six hundred forty-eight million, eight hundred sixty-six thousand, fifty-two".