635478872 has 16 divisors (see below), whose sum is σ = 1361740560. Its totient is φ = 272348064.

The previous prime is 635478859. The next prime is 635478919. The reversal of 635478872 is 278874536.

It is a self number, because there is not a number n which added to its sum of digits gives 635478872.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5673863 + ... + 5673974.

It is an arithmetic number, because the mean of its divisors is an integer number (85108785).

Almost surely, 2^635478872 is an apocalyptic number.

It is an amenable number.

635478872 is an abundant number, since it is smaller than the sum of its proper divisors (726261688).

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

635478872 is a wasteful number, since it uses less digits than its factorization.

635478872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11347850 (or 11347846 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 50.

The square root of 635478872 is about 25208.7062738253. The cubic root of 635478872 is about 859.7398131237.

The spelling of 635478872 in words is "six hundred thirty-five million, four hundred seventy-eight thousand, eight hundred seventy-two".