10991984 has 30 divisors (see below), whose sum is σ = 21829704. Its totient is φ = 5361760.

The previous prime is 10991983. The next prime is 10991987. The reversal of 10991984 is 48919901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10991983) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 35189 + ... + 35499.

Almost surely, 2^10991984 is an apocalyptic number.

It is an amenable number.

10991984 is a deficient number, since it is larger than the sum of its proper divisors (10837720).

10991984 is an equidigital number, since it uses as much as digits as its factorization.

10991984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 10991984 is about 3315.4161126471. The cubic root of 10991984 is about 222.3439734309.

The spelling of 10991984 in words is "ten million, nine hundred ninety-one thousand, nine hundred eighty-four".