635938 has 4 divisors (see below), whose sum is σ = 953910. Its totient is φ = 317968.

The previous prime is 635923. The next prime is 635939. The reversal of 635938 is 839536.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 635209 + 729 = 797^2 + 27^2 .

It is not an unprimeable number, because it can be changed into a prime (635939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158983 + ... + 158986.

2⁶³⁵⁹³⁸ is an apocalyptic number.

635938 is a deficient number, since it is larger than the sum of its proper divisors (317972).

635938 is a wasteful number, since it uses less digits than its factorization.

635938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317971.

The product of its digits is 19440, while the sum is 34.

The square root of 635938 is about 797.4572088833. The cubic root of 635938 is about 85.9946814811.

The spelling of 635938 in words is "six hundred thirty-five thousand, nine hundred thirty-eight".