638320622 has 16 divisors (see below), whose sum is σ = 962416944. Its totient is φ = 317520000.

The previous prime is 638320577. The next prime is 638320649. The reversal of 638320622 is 226023836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392972 + ... + 394592.

It is an arithmetic number, because the mean of its divisors is an integer number (60151059).

Almost surely, 2^638320622 is an apocalyptic number.

638320622 is a deficient number, since it is larger than the sum of its proper divisors (324096322).

638320622 is a wasteful number, since it uses less digits than its factorization.

638320622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 638320622 is about 25265.0078567176. The cubic root of 638320622 is about 861.0194427801.

The spelling of 638320622 in words is "six hundred thirty-eight million, three hundred twenty thousand, six hundred twenty-two".