1131444420 has 48 divisors (see below), whose sum is σ = 3199428288. Its totient is φ = 298729600.

The previous prime is 1131444407. The next prime is 1131444421. The reversal of 1131444420 is 244441311.

It is not an unprimeable number, because it can be changed into a prime (1131444421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87294 + ... + 99413.

It is an arithmetic number, because the mean of its divisors is an integer number (66654756).

Almost surely, 2^1131444420 is an apocalyptic number.

1131444420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131444420 is an abundant number, since it is smaller than the sum of its proper divisors (2067983868).

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

1131444420 is a wasteful number, since it uses less digits than its factorization.

1131444420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186820 (or 186818 counting only the distinct ones).

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

The square root of 1131444420 is about 33636.9502184725. The cubic root of 1131444420 is about 1042.0240476421.

Adding to 1131444420 its reverse (244441311), we get a palindrome (1375885731).

The spelling of 1131444420 in words is "one billion, one hundred thirty-one million, four hundred forty-four thousand, four hundred twenty".