638196700 has 36 divisors (see below), whose sum is σ = 1457779960. Its totient is φ = 241842240.

The previous prime is 638196673. The next prime is 638196703. The reversal of 638196700 is 7691836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638196703) 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, 166047 + ... + 169846.

Almost surely, 2^638196700 is an apocalyptic number.

It is an amenable number.

638196700 is an abundant number, since it is smaller than the sum of its proper divisors (819583260).

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

638196700 is a wasteful number, since it uses less digits than its factorization.

638196700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335926 (or 335919 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 638196700 is about 25262.5552943482. Note that the first 3 decimals coincide. The cubic root of 638196700 is about 860.9637204397.

The spelling of 638196700 in words is "six hundred thirty-eight million, one hundred ninety-six thousand, seven hundred".