1131987724 has 12 divisors (see below), whose sum is σ = 2263975504. Its totient is φ = 485137584.

The previous prime is 1131987697. The next prime is 1131987733. The reversal of 1131987724 is 4277891311.

1131987724 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20214039 + ... + 20214094.

Almost surely, 2^1131987724 is an apocalyptic number.

1131987724 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1131987724 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1131987724 is a wasteful number, since it uses less digits than its factorization.

1131987724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40428144 (or 40428142 counting only the distinct ones).

The product of its digits is 84672, while the sum is 43.

The square root of 1131987724 is about 33645.0252489131. The cubic root of 1131987724 is about 1042.1908094764.

The spelling of 1131987724 in words is "one billion, one hundred thirty-one million, nine hundred eighty-seven thousand, seven hundred twenty-four".