648633338 has 8 divisors (see below), whose sum is σ = 973196532. Its totient is φ = 324234496.

The previous prime is 648633331. The next prime is 648633341. The reversal of 648633338 is 833336846.

It can be written as a sum of positive squares in 2 ways, for example, as 546764689 + 101868649 = 23383^2 + 10093^2 .

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 (648633331) 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, 30695 + ... + 47322.

Almost surely, 2^648633338 is an apocalyptic number.

648633338 is a deficient number, since it is larger than the sum of its proper divisors (324563194).

648633338 is a wasteful number, since it uses less digits than its factorization.

648633338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82176.

The product of its digits is 746496, while the sum is 44.

The square root of 648633338 is about 25468.2810177680. The cubic root of 648633338 is about 865.6315736758.

The spelling of 648633338 in words is "six hundred forty-eight million, six hundred thirty-three thousand, three hundred thirty-eight".