538638628 has 12 divisors (see below), whose sum is σ = 1028310192. Its totient is φ = 244835720.

The previous prime is 538638613. The next prime is 538638631. The reversal of 538638628 is 826836835.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6120850 + ... + 6120937.

It is an arithmetic number, because the mean of its divisors is an integer number (85692516).

Almost surely, 2^538638628 is an apocalyptic number.

It is an amenable number.

538638628 is a deficient number, since it is larger than the sum of its proper divisors (489671564).

538638628 is a wasteful number, since it uses less digits than its factorization.

538638628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12241802 (or 12241800 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 49.

The square root of 538638628 is about 23208.5895306027. The cubic root of 538638628 is about 813.6403883340.

The spelling of 538638628 in words is "five hundred thirty-eight million, six hundred thirty-eight thousand, six hundred twenty-eight".