538687444 has 6 divisors (see below), whose sum is σ = 942703034. Its totient is φ = 269343720.

The previous prime is 538687427. The next prime is 538687447. The reversal of 538687444 is 444786835.

538687444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 274299844 + 264387600 = 16562^2 + 16260^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538687447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67335927 + ... + 67335934.

Almost surely, 2^538687444 is an apocalyptic number.

It is an amenable number.

538687444 is a deficient number, since it is larger than the sum of its proper divisors (404015590).

538687444 is a wasteful number, since it uses less digits than its factorization.

538687444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134671865 (or 134671863 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 49.

The square root of 538687444 is about 23209.6411863691. The cubic root of 538687444 is about 813.6649672554.

The spelling of 538687444 in words is "five hundred thirty-eight million, six hundred eighty-seven thousand, four hundred forty-four".