39185286138 has 16 divisors (see below), whose sum is σ = 87078413760. Its totient is φ = 13061762028.

The previous prime is 39185286137. The next prime is 39185286143. The reversal of 39185286138 is 83168258193.

39185286138 is a `hidden beast` number, since 3 + 9 + 18 + 5 + 2 + 8 + 613 + 8 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 725653447 = 39185286138 / (3 + 9 + 1 + 8 + 5 + 2 + 8 + 6 + 1 + 3 + 8).

It is not an unprimeable number, because it can be changed into a prime (39185286131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362826670 + ... + 362826777.

It is an arithmetic number, because the mean of its divisors is an integer number (5442400860).

Almost surely, 2^39185286138 is an apocalyptic number.

39185286138 is an abundant number, since it is smaller than the sum of its proper divisors (47893127622).

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

39185286138 is a wasteful number, since it uses less digits than its factorization.

39185286138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725653458 (or 725653452 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The spelling of 39185286138 in words is "thirty-nine billion, one hundred eighty-five million, two hundred eighty-six thousand, one hundred thirty-eight".