635993140 has 48 divisors (see below), whose sum is σ = 1351913472. Its totient is φ = 251306496.

The previous prime is 635993131. The next prime is 635993147. The reversal of 635993140 is 41399536.

635993140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 635993093 and 635993102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (635993147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 855609 + ... + 856351.

It is an arithmetic number, because the mean of its divisors is an integer number (28164864).

Almost surely, 2^635993140 is an apocalyptic number.

It is an amenable number.

635993140 is an abundant number, since it is smaller than the sum of its proper divisors (715920332).

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

635993140 is a wasteful number, since it uses less digits than its factorization.

635993140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216 (or 1214 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 635993140 is about 25218.9044171233. The cubic root of 635993140 is about 859.9716684375.

It can be divided in two parts, 6359 and 93140, that added together give a palindrome (99499).

The spelling of 635993140 in words is "six hundred thirty-five million, nine hundred ninety-three thousand, one hundred forty".