648864012 has 24 divisors (see below), whose sum is σ = 1514753856. Its totient is φ = 216182608.

The previous prime is 648863993. The next prime is 648864019. The reversal of 648864012 is 210468846.

It is a super-2 number, since 2×648864012² = 842049012137472288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (648864019) 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, 14863 + ... + 38969.

It is an arithmetic number, because the mean of its divisors is an integer number (63114744).

Almost surely, 2^648864012 is an apocalyptic number.

It is an amenable number.

648864012 is an abundant number, since it is smaller than the sum of its proper divisors (865889844).

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

648864012 is a wasteful number, since it uses less digits than its factorization.

648864012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26357 (or 26355 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 648864012 is about 25472.8092679233. The cubic root of 648864012 is about 865.7341766000.

It can be divided in two parts, 6488 and 64012, that added together give a triangular number (70500 = T₃₇₅).

The spelling of 648864012 in words is "six hundred forty-eight million, eight hundred sixty-four thousand, twelve".