638353422 has 24 divisors (see below), whose sum is σ = 1580684976. Its totient is φ = 182386656.

The previous prime is 638353367. The next prime is 638353427. The reversal of 638353422 is 224353836.

It is a happy number.

It is a super-2 number, since 2×638353422² = 814990182758220168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638353427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2533023 + ... + 2533274.

It is an arithmetic number, because the mean of its divisors is an integer number (65861874).

Almost surely, 2^638353422 is an apocalyptic number.

638353422 is an abundant number, since it is smaller than the sum of its proper divisors (942331554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

638353422 is a wasteful number, since it uses less digits than its factorization.

638353422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5066312 (or 5066309 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 638353422 is about 25265.6569675122. The cubic root of 638353422 is about 861.0341903082.

The spelling of 638353422 in words is "six hundred thirty-eight million, three hundred fifty-three thousand, four hundred twenty-two".