538869138 has 32 divisors (see below), whose sum is σ = 1091171520. Its totient is φ = 177393600.

The previous prime is 538869113. The next prime is 538869143. The reversal of 538869138 is 831968835.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307581 + ... + 309327.

It is an arithmetic number, because the mean of its divisors is an integer number (34099110).

Almost surely, 2^538869138 is an apocalyptic number.

538869138 is an abundant number, since it is smaller than the sum of its proper divisors (552302382).

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

538869138 is a wasteful number, since it uses less digits than its factorization.

538869138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362.

The product of its digits is 1244160, while the sum is 51.

The square root of 538869138 is about 23213.5550487210. Note that the first 3 decimals coincide. The cubic root of 538869138 is about 813.7564373808.

The spelling of 538869138 in words is "five hundred thirty-eight million, eight hundred sixty-nine thousand, one hundred thirty-eight".