1131144588 has 72 divisors (see below), whose sum is σ = 3388799232. Its totient is φ = 323182224.

The previous prime is 1131144529. The next prime is 1131144643. The reversal of 1131144588 is 8854411311.

1131144588 is a `hidden beast` number, since 1 + 1 + 31 + 1 + 44 + 588 = 666.

1131144588 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76320 + ... + 89927.

It is an arithmetic number, because the mean of its divisors is an integer number (47066656).

Almost surely, 2^1131144588 is an apocalyptic number.

1131144588 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1131144588 is an abundant number, since it is smaller than the sum of its proper divisors (2257654644).

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

1131144588 is a wasteful number, since it uses less digits than its factorization.

1131144588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166273 (or 166259 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 1131144588 is about 33632.4930387267. The cubic root of 1131144588 is about 1041.9319942895.

Adding to 1131144588 its reverse (8854411311), we get a palindrome (9985555899).

The spelling of 1131144588 in words is "one billion, one hundred thirty-one million, one hundred forty-four thousand, five hundred eighty-eight".