648221952 has 72 divisors (see below), whose sum is σ = 1971691456. Its totient is φ = 185204736.

The previous prime is 648221941. The next prime is 648221957. The reversal of 648221952 is 259122846.

It is a self number, because there is not a number n which added to its sum of digits gives 648221952.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648221957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54913 + ... + 65664.

Almost surely, 2^648221952 is an apocalyptic number.

It is an amenable number.

648221952 is an abundant number, since it is smaller than the sum of its proper divisors (1323469504).

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

648221952 is a wasteful number, since it uses less digits than its factorization.

648221952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120603 (or 120589 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 648221952 is about 25460.2032984813. The cubic root of 648221952 is about 865.4485303436.

The spelling of 648221952 in words is "six hundred forty-eight million, two hundred twenty-one thousand, nine hundred fifty-two".