648349946 has 8 divisors (see below), whose sum is σ = 973667604. Its totient is φ = 323794080.

The previous prime is 648349883. The next prime is 648349951. The reversal of 648349946 is 649943846.

It can be written as a sum of positive squares in 2 ways, for example, as 503508721 + 144841225 = 22439^2 + 12035^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188315 + ... + 191726.

Almost surely, 2^648349946 is an apocalyptic number.

648349946 is a deficient number, since it is larger than the sum of its proper divisors (325317658).

648349946 is a wasteful number, since it uses less digits than its factorization.

648349946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380896.

The product of its digits is 4478976, while the sum is 53.

The square root of 648349946 is about 25462.7167835642. The cubic root of 648349946 is about 865.5054886786.

The spelling of 648349946 in words is "six hundred forty-eight million, three hundred forty-nine thousand, nine hundred forty-six".