635144140 has 48 divisors (see below), whose sum is σ = 1418764032. Its totient is φ = 238012416.

The previous prime is 635144131. The next prime is 635144143. The reversal of 635144140 is 41441536.

It is a junction number, because it is equal to n+sod(n) for n = 635144099 and 635144108.

It is not an unprimeable number, because it can be changed into a prime (635144143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71632 + ... + 80008.

It is an arithmetic number, because the mean of its divisors is an integer number (29557584).

Almost surely, 2^635144140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 635144140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (709382016).

635144140 is an abundant number, since it is smaller than the sum of its proper divisors (783619892).

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

635144140 is a wasteful number, since it uses less digits than its factorization.

635144140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8626 (or 8624 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 635144140 is about 25202.0661851365. The cubic root of 635144140 is about 859.5888335588.

Adding to 635144140 its reverse (41441536), we get a palindrome (676585676).

The spelling of 635144140 in words is "six hundred thirty-five million, one hundred forty-four thousand, one hundred forty".