635825980 has 24 divisors (see below), whose sum is σ = 1355166288. Its totient is φ = 250533888.

The previous prime is 635825963. The next prime is 635825989. The reversal of 635825980 is 89528536.

It is a self number, because there is not a number n which added to its sum of digits gives 635825980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (635825989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235909 + ... + 238588.

It is an arithmetic number, because the mean of its divisors is an integer number (56465262).

Almost surely, 2^635825980 is an apocalyptic number.

It is an amenable number.

635825980 is an abundant number, since it is smaller than the sum of its proper divisors (719340308).

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

635825980 is a wasteful number, since it uses less digits than its factorization.

635825980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474573 (or 474571 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 46.

The square root of 635825980 is about 25215.5900188752. The cubic root of 635825980 is about 859.8963188510.

The spelling of 635825980 in words is "six hundred thirty-five million, eight hundred twenty-five thousand, nine hundred eighty".