1183809138 has 8 divisors (see below), whose sum is σ = 2367618288. Its totient is φ = 394603044.

The previous prime is 1183809119. The next prime is 1183809157. The reversal of 1183809138 is 8319083811.

It is an interprime number because it is at equal distance from previous prime (1183809119) and next prime (1183809157).

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

1183809138 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1183809138.

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, 98650756 + ... + 98650767.

It is an arithmetic number, because the mean of its divisors is an integer number (295952286).

Almost surely, 2^1183809138 is an apocalyptic number.

1183809138 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.

1183809138 is a wasteful number, since it uses less digits than its factorization.

1183809138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197301528.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 1183809138 is about 34406.5275492892. The cubic root of 1183809138 is about 1057.8576458545.

The spelling of 1183809138 in words is "one billion, one hundred eighty-three million, eight hundred nine thousand, one hundred thirty-eight".