1131806240 has 24 divisors (see below), whose sum is σ = 2673892620. Its totient is φ = 452722432.

The previous prime is 1131806237. The next prime is 1131806257. The reversal of 1131806240 is 426081311.

It can be written as a sum of positive squares in 2 ways, for example, as 1014040336 + 117765904 = 31844^2 + 10852^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3536735 + ... + 3537054.

Almost surely, 2^1131806240 is an apocalyptic number.

1131806240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131806240 is an abundant number, since it is smaller than the sum of its proper divisors (1542086380).

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

1131806240 is an equidigital number, since it uses as much as digits as its factorization.

1131806240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7073804 (or 7073796 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1131806240 is about 33642.3281001776. The cubic root of 1131806240 is about 1042.1351106787.

Adding to 1131806240 its reverse (426081311), we get a palindrome (1557887551).

The spelling of 1131806240 in words is "one billion, one hundred thirty-one million, eight hundred six thousand, two hundred forty".