648686248 has 16 divisors (see below), whose sum is σ = 1390042080. Its totient is φ = 278008368.

The previous prime is 648686243. The next prime is 648686279. The reversal of 648686248 is 842686846.

It is a junction number, because it is equal to n+sod(n) for n = 648686195 and 648686204.

It is not an unprimeable number, because it can be changed into a prime (648686243) 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 3 ways as a sum of consecutive naturals, for example, 5791786 + ... + 5791897.

It is an arithmetic number, because the mean of its divisors is an integer number (86877630).

Almost surely, 2^648686248 is an apocalyptic number.

It is an amenable number.

648686248 is an abundant number, since it is smaller than the sum of its proper divisors (741355832).

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

648686248 is a wasteful number, since it uses less digits than its factorization.

648686248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11583696 (or 11583692 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 52.

The square root of 648686248 is about 25469.3197396397. The cubic root of 648686248 is about 865.6551099937.

The spelling of 648686248 in words is "six hundred forty-eight million, six hundred eighty-six thousand, two hundred forty-eight".