638324395 has 8 divisors (see below), whose sum is σ = 767152080. Its totient is φ = 509884320.

The previous prime is 638324371. The next prime is 638324411. The reversal of 638324395 is 593423836.

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

It is not a de Polignac number, because 638324395 - 2¹⁵ = 638291627 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 93265 + ... + 99874.

It is an arithmetic number, because the mean of its divisors is an integer number (95894010).

Almost surely, 2^638324395 is an apocalyptic number.

638324395 is a deficient number, since it is larger than the sum of its proper divisors (128827685).

638324395 is a wasteful number, since it uses less digits than its factorization.

638324395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193805.

The product of its digits is 466560, while the sum is 43.

The square root of 638324395 is about 25265.0825250978. The cubic root of 638324395 is about 861.0211392212.

The spelling of 638324395 in words is "six hundred thirty-eight million, three hundred twenty-four thousand, three hundred ninety-five".