1131691488 has 48 divisors (see below), whose sum is σ = 2999558016. Its totient is φ = 373564800.

The previous prime is 1131691441. The next prime is 1131691523. The reversal of 1131691488 is 8841961311.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47338 + ... + 67113.

It is an arithmetic number, because the mean of its divisors is an integer number (62490792).

Almost surely, 2^1131691488 is an apocalyptic number.

It is an amenable number.

1131691488 is an abundant number, since it is smaller than the sum of its proper divisors (1867866528).

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

1131691488 is a wasteful number, since it uses less digits than its factorization.

1131691488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114567 (or 114559 counting only the distinct ones).

The product of its digits is 41472, while the sum is 42.

The square root of 1131691488 is about 33640.6225863910. The cubic root of 1131691488 is about 1042.0998893584.

The spelling of 1131691488 in words is "one billion, one hundred thirty-one million, six hundred ninety-one thousand, four hundred eighty-eight".