638271196 has 6 divisors (see below), whose sum is σ = 1116974600. Its totient is φ = 319135596.

The previous prime is 638271187. The next prime is 638271203. The reversal of 638271196 is 691172836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79783896 + ... + 79783903.

Almost surely, 2^638271196 is an apocalyptic number.

It is an amenable number.

638271196 is a deficient number, since it is larger than the sum of its proper divisors (478703404).

638271196 is a wasteful number, since it uses less digits than its factorization.

638271196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159567803 (or 159567801 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 638271196 is about 25264.0296864930. The cubic root of 638271196 is about 860.9972189196.

The spelling of 638271196 in words is "six hundred thirty-eight million, two hundred seventy-one thousand, one hundred ninety-six".