648382906 has 8 divisors (see below), whose sum is σ = 977948244. Its totient is φ = 322400160.

The previous prime is 648382883. The next prime is 648382909. The reversal of 648382906 is 609283846.

It is a happy number.

648382906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 486864225 + 161518681 = 22065^2 + 12709^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (648382909) 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, 895195 + ... + 895918.

Almost surely, 2^648382906 is an apocalyptic number.

648382906 is a deficient number, since it is larger than the sum of its proper divisors (329565338).

648382906 is a wasteful number, since it uses less digits than its factorization.

648382906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791296.

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 648382906 is about 25463.3639961416. The cubic root of 648382906 is about 865.5201549236.

The spelling of 648382906 in words is "six hundred forty-eight million, three hundred eighty-two thousand, nine hundred six".