1185186138 has 8 divisors (see below), whose sum is σ = 2370372288. Its totient is φ = 395062044.

The previous prime is 1185186137. The next prime is 1185186179. The reversal of 1185186138 is 8316815811.

It is a sphenic number, since it is the product of 3 distinct primes.

1185186138 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1185186138.

It is not an unprimeable number, because it can be changed into a prime (1185186137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98765506 + ... + 98765517.

It is an arithmetic number, because the mean of its divisors is an integer number (296296536).

Almost surely, 2^1185186138 is an apocalyptic number.

1185186138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1185186138 is a wasteful number, since it uses less digits than its factorization.

1185186138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197531028.

The product of its digits is 46080, while the sum is 42.

The square root of 1185186138 is about 34426.5324713367. The cubic root of 1185186138 is about 1058.2676515723.

The spelling of 1185186138 in words is "one billion, one hundred eighty-five million, one hundred eighty-six thousand, one hundred thirty-eight".