638310922 has 8 divisors (see below), whose sum is σ = 962479872. Its totient is φ = 317484300.

The previous prime is 638310899. The next prime is 638310949. The reversal of 638310922 is 229013836.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 835104 + ... + 835867.

It is an arithmetic number, because the mean of its divisors is an integer number (120309984).

Almost surely, 2^638310922 is an apocalyptic number.

638310922 is a deficient number, since it is larger than the sum of its proper divisors (324168950).

638310922 is a wasteful number, since it uses less digits than its factorization.

638310922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671164.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 638310922 is about 25264.8158908788. The cubic root of 638310922 is about 861.0150813716.

The spelling of 638310922 in words is "six hundred thirty-eight million, three hundred ten thousand, nine hundred twenty-two".