1131430240 has 96 divisors (see below), whose sum is σ = 2979335520. Its totient is φ = 403513344.

The previous prime is 1131430231. The next prime is 1131430249. The reversal of 1131430240 is 420341311.

It is an interprime number because it is at equal distance from previous prime (1131430231) and next prime (1131430249).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131430249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40734 + ... + 62626.

It is an arithmetic number, because the mean of its divisors is an integer number (31034745).

Almost surely, 2^1131430240 is an apocalyptic number.

1131430240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131430240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1489667760).

1131430240 is an abundant number, since it is smaller than the sum of its proper divisors (1847905280).

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

1131430240 is a wasteful number, since it uses less digits than its factorization.

1131430240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21944 (or 21936 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1131430240 is about 33636.7394377041. The cubic root of 1131430240 is about 1042.0196945154.

Adding to 1131430240 its reverse (420341311), we get a palindrome (1551771551).

The spelling of 1131430240 in words is "one billion, one hundred thirty-one million, four hundred thirty thousand, two hundred forty".