11683778 has 6 divisors (see below), whose sum is σ = 17532921. Its totient is φ = 5839472.

The previous prime is 11683769. The next prime is 11683817. The reversal of 11683778 is 87738611.

It can be written as a sum of positive squares in 2 ways, for example, as 7711729 + 3972049 = 2777^2 + 1993^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2417.

It is a Duffinian number.

It is a Curzon number.

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 2 ways as a sum of consecutive naturals, for example, 3626 + ... + 6042.

Almost surely, 2^11683778 is an apocalyptic number.

11683778 is a deficient number, since it is larger than the sum of its proper divisors (5849143).

11683778 is an frugal number, since it uses more digits than its factorization.

11683778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4836 (or 2419 counting only the distinct ones).

The product of its digits is 56448, while the sum is 41.

The square root of 11683778 is about 3418.1541802558. The cubic root of 11683778 is about 226.9138993069.

Multiplying 11683778 by its product of digits (56448), we get a square (659525900544 = 812112²).

The spelling of 11683778 in words is "eleven million, six hundred eighty-three thousand, seven hundred seventy-eight".