1131240444 has 48 divisors (see below), whose sum is σ = 2681392896. Its totient is φ = 371123200.

The previous prime is 1131240443. The next prime is 1131240511. The reversal of 1131240444 is 4440421311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131240443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 928924 + ... + 930140.

It is an arithmetic number, because the mean of its divisors is an integer number (55862352).

Almost surely, 2^1131240444 is an apocalyptic number.

It is an amenable number.

1131240444 is an abundant number, since it is smaller than the sum of its proper divisors (1550152452).

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

1131240444 is a wasteful number, since it uses less digits than its factorization.

1131240444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386 (or 2384 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 1131240444 is about 33633.9180590070. The cubic root of 1131240444 is about 1041.9614254260.

Adding to 1131240444 its reverse (4440421311), we get a palindrome (5571661755).

The spelling of 1131240444 in words is "one billion, one hundred thirty-one million, two hundred forty thousand, four hundred forty-four".