11947984 has 10 divisors (see below), whose sum is σ = 23149250. Its totient is φ = 5973984.

The previous prime is 11947981. The next prime is 11947993. The reversal of 11947984 is 48974911.

It can be written as a sum of positive squares in only one way, i.e., 11370384 + 577600 = 3372^2 + 760^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11947984.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11947981) 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 as a sum of consecutive naturals, namely, 373359 + ... + 373390.

It is an arithmetic number, because the mean of its divisors is an integer number (2314925).

Almost surely, 2^11947984 is an apocalyptic number.

It is an amenable number.

11947984 is a deficient number, since it is larger than the sum of its proper divisors (11201266).

11947984 is an equidigital number, since it uses as much as digits as its factorization.

11947984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746757 (or 746751 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 11947984 is about 3456.5855985351. The cubic root of 11947984 is about 228.6115724134.

The spelling of 11947984 in words is "eleven million, nine hundred forty-seven thousand, nine hundred eighty-four".