635989344 has 48 divisors (see below), whose sum is σ = 1676696112. Its totient is φ = 211079168.

The previous prime is 635989313. The next prime is 635989369. The reversal of 635989344 is 443989536.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8152 + ... + 36584.

It is an arithmetic number, because the mean of its divisors is an integer number (34931169).

Almost surely, 2^635989344 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 635989344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (838348056).

635989344 is an abundant number, since it is smaller than the sum of its proper divisors (1040706768).

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

635989344 is a wasteful number, since it uses less digits than its factorization.

635989344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28679 (or 28671 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 51.

The square root of 635989344 is about 25218.8291560096. The cubic root of 635989344 is about 859.9699574867.

It can be divided in two parts, 6359 and 89344, that added together give a triangular number (95703 = T₄₃₇).

The spelling of 635989344 in words is "six hundred thirty-five million, nine hundred eighty-nine thousand, three hundred forty-four".