648452290 has 8 divisors (see below), whose sum is σ = 1167214140. Its totient is φ = 259380912.

The previous prime is 648452263. The next prime is 648452293. The reversal of 648452290 is 92254846.

It can be written as a sum of positive squares in 2 ways, for example, as 640140601 + 8311689 = 25301^2 + 2883^2 .

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 (648452293) 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 3 ways as a sum of consecutive naturals, for example, 32422605 + ... + 32422624.

Almost surely, 2^648452290 is an apocalyptic number.

648452290 is a deficient number, since it is larger than the sum of its proper divisors (518761850).

648452290 is a wasteful number, since it uses less digits than its factorization.

648452290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64845236.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 648452290 is about 25464.7263876917. The cubic root of 648452290 is about 865.5510271689.

The spelling of 648452290 in words is "six hundred forty-eight million, four hundred fifty-two thousand, two hundred ninety".