648307328 has 32 divisors (see below), whose sum is σ = 1306084500. Its totient is φ = 320505856.

The previous prime is 648307327. The next prime is 648307367. The reversal of 648307328 is 823703846.

It can be written as a sum of positive squares in 2 ways, for example, as 587965504 + 60341824 = 24248^2 + 7768^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (648307321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17063 + ... + 39846.

Almost surely, 2^648307328 is an apocalyptic number.

It is an amenable number.

648307328 is an abundant number, since it is smaller than the sum of its proper divisors (657777172).

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

648307328 is an equidigital number, since it uses as much as digits as its factorization.

648307328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57012 (or 57000 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 648307328 is about 25461.8798991748. The cubic root of 648307328 is about 865.4865241665.

It can be divided in two parts, 648 and 307328, that multiplied together give a square (199148544 = 14112²).

The spelling of 648307328 in words is "six hundred forty-eight million, three hundred seven thousand, three hundred twenty-eight".