635238668 has 12 divisors (see below), whose sum is σ = 1111881960. Its totient is φ = 317558112.

The previous prime is 635238641. The next prime is 635238697. The reversal of 635238668 is 866832536.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14480 + ... + 38472.

It is an arithmetic number, because the mean of its divisors is an integer number (92656830).

Almost surely, 2^635238668 is an apocalyptic number.

It is an amenable number.

635238668 is a deficient number, since it is larger than the sum of its proper divisors (476643292).

635238668 is a wasteful number, since it uses less digits than its factorization.

635238668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30616 (or 30614 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 47.

The square root of 635238668 is about 25203.9415171516. The cubic root of 635238668 is about 859.6314754188.

The spelling of 635238668 in words is "six hundred thirty-five million, two hundred thirty-eight thousand, six hundred sixty-eight".