11631240 has 48 divisors (see below), whose sum is σ = 37802700. Its totient is φ = 3101568.

The previous prime is 11631239. The next prime is 11631251. The reversal of 11631240 is 4213611.

It is a happy number.

11631240 is a `hidden beast` number, since 11 + 631 + 24 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11249316 + 381924 = 3354^2 + 618^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15795 + ... + 16514.

Almost surely, 2^11631240 is an apocalyptic number.

11631240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11631240 is an abundant number, since it is smaller than the sum of its proper divisors (26171460).

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

11631240 is a wasteful number, since it uses less digits than its factorization.

11631240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32326 (or 32319 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 11631240 is about 3410.4603794796. The cubic root of 11631240 is about 226.5732698646.

Adding to 11631240 its reverse (4213611), we get a palindrome (15844851).

The spelling of 11631240 in words is "eleven million, six hundred thirty-one thousand, two hundred forty".