1144840187 has 6 divisors (see below), whose sum is σ = 1155893004. Its totient is φ = 1133794020.

The previous prime is 1144840183. The next prime is 1144840211. The reversal of 1144840187 is 7810484411.

It is not a de Polignac number, because 1144840187 - 2² = 1144840183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1144840187.

It is not an unprimeable number, because it can be changed into a prime (1144840181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 348362 + ... + 351632.

It is an arithmetic number, because the mean of its divisors is an integer number (192648834).

Almost surely, 2^1144840187 is an apocalyptic number.

1144840187 is a deficient number, since it is larger than the sum of its proper divisors (11052817).

1144840187 is an frugal number, since it uses more digits than its factorization.

1144840187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6649 (or 3378 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 1144840187 is about 33835.4870956515. The cubic root of 1144840187 is about 1046.1202814567.

The spelling of 1144840187 in words is "one billion, one hundred forty-four million, eight hundred forty thousand, one hundred eighty-seven".