648003904 has 14 divisors (see below), whose sum is σ = 1285882874. Its totient is φ = 324001920.

The previous prime is 648003887. The next prime is 648003913. The reversal of 648003904 is 409300846.

It can be written as a sum of positive squares in only one way, i.e., 622602304 + 25401600 = 24952^2 + 5040^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 648003904.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5062467 + ... + 5062594.

Almost surely, 2^648003904 is an apocalyptic number.

648003904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

648003904 is a deficient number, since it is larger than the sum of its proper divisors (637878970).

648003904 is a wasteful number, since it uses less digits than its factorization.

648003904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10125073 (or 10125063 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 648003904 is about 25455.9208044023. The cubic root of 648003904 is about 865.3514800027.

The spelling of 648003904 in words is "six hundred forty-eight million, three thousand, nine hundred four".