648739792 has 10 divisors (see below), whose sum is σ = 1256933378. Its totient is φ = 324369888.

The previous prime is 648739789. The next prime is 648739829. The reversal of 648739792 is 297937846.

It can be written as a sum of positive squares in only one way, i.e., 574848576 + 73891216 = 23976^2 + 8596^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20273103 + ... + 20273134.

Almost surely, 2^648739792 is an apocalyptic number.

It is an amenable number.

648739792 is a deficient number, since it is larger than the sum of its proper divisors (608193586).

648739792 is a wasteful number, since it uses less digits than its factorization.

648739792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40546245 (or 40546239 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 55.

The square root of 648739792 is about 25470.3708649874. The cubic root of 648739792 is about 865.6789270352.

The spelling of 648739792 in words is "six hundred forty-eight million, seven hundred thirty-nine thousand, seven hundred ninety-two".