1131463788 has 96 divisors (see below), whose sum is σ = 3269091840. Its totient is φ = 298359360.

The previous prime is 1131463783. The next prime is 1131463789. The reversal of 1131463788 is 8873641311.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1131463783) 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 31 ways as a sum of consecutive naturals, for example, 181483 + ... + 187613.

It is an arithmetic number, because the mean of its divisors is an integer number (34053040).

Almost surely, 2^1131463788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131463788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1634545920).

1131463788 is an abundant number, since it is smaller than the sum of its proper divisors (2137628052).

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

1131463788 is a wasteful number, since it uses less digits than its factorization.

1131463788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6184 (or 6156 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 1131463788 is about 33637.2381149226. The cubic root of 1131463788 is about 1042.0299933773.

The spelling of 1131463788 in words is "one billion, one hundred thirty-one million, four hundred sixty-three thousand, seven hundred eighty-eight".