538187139 has 48 divisors (see below), whose sum is σ = 982087200. Its totient is φ = 289433088.

The previous prime is 538187123. The next prime is 538187159. The reversal of 538187139 is 931781835.

538187139 is a `hidden beast` number, since 538 + 1 + 87 + 1 + 39 = 666.

It is not a de Polignac number, because 538187139 - 2⁴ = 538187123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 538187094 and 538187103.

It is not an unprimeable number, because it can be changed into a prime (538187119) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10527 + ... + 34455.

It is an arithmetic number, because the mean of its divisors is an integer number (20460150).

Almost surely, 2^538187139 is an apocalyptic number.

538187139 is a deficient number, since it is larger than the sum of its proper divisors (443900061).

538187139 is a wasteful number, since it uses less digits than its factorization.

538187139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23969 (or 23956 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 538187139 is about 23198.8607263374. The cubic root of 538187139 is about 813.4129926046.

The spelling of 538187139 in words is "five hundred thirty-eight million, one hundred eighty-seven thousand, one hundred thirty-nine".