11531984 has 20 divisors (see below), whose sum is σ = 23658084. Its totient is φ = 5426688.

The previous prime is 11531977. The next prime is 11531987. The reversal of 11531984 is 48913511.

It can be written as a sum of positive squares in 2 ways, for example, as 7997584 + 3534400 = 2828^2 + 1880^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11531984.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20927 + ... + 21470.

Almost surely, 2^11531984 is an apocalyptic number.

It is an amenable number.

11531984 is an abundant number, since it is smaller than the sum of its proper divisors (12126100).

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

11531984 is a wasteful number, since it uses less digits than its factorization.

11531984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42422 (or 42416 counting only the distinct ones).

The product of its digits is 4320, while the sum is 32.

The square root of 11531984 is about 3395.8775007353. The cubic root of 11531984 is about 225.9269349002.

The spelling of 11531984 in words is "eleven million, five hundred thirty-one thousand, nine hundred eighty-four".