648309456 has 30 divisors (see below), whose sum is σ = 1814366450. Its totient is φ = 216103104.

The previous prime is 648309439. The next prime is 648309457. The reversal of 648309456 is 654903846.

It can be written as a sum of positive squares in only one way, i.e., 437479056 + 210830400 = 20916^2 + 14520^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648309457) 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 5 ways as a sum of consecutive naturals, for example, 2250931 + ... + 2251218.

Almost surely, 2^648309456 is an apocalyptic number.

It is an amenable number.

648309456 is an abundant number, since it is smaller than the sum of its proper divisors (1166056994).

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

648309456 is a wasteful number, since it uses less digits than its factorization.

648309456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502163 (or 4502154 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 648309456 is about 25461.9216870997. The cubic root of 648309456 is about 865.4874711213.

The spelling of 648309456 in words is "six hundred forty-eight million, three hundred nine thousand, four hundred fifty-six".