11778728 has 32 divisors (see below), whose sum is σ = 24434760. Its totient is φ = 5287680.

The previous prime is 11778719. The next prime is 11778731. The reversal of 11778728 is 82787711.

It can be written as a sum of positive squares in 4 ways, for example, as 11710084 + 68644 = 3422^2 + 262^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2318 + ... + 5378.

Almost surely, 2^11778728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11778728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12217380).

11778728 is an abundant number, since it is smaller than the sum of its proper divisors (12656032).

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

11778728 is a wasteful number, since it uses less digits than its factorization.

11778728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3117 (or 3113 counting only the distinct ones).

The product of its digits is 43904, while the sum is 41.

The square root of 11778728 is about 3432.0151514817. The cubic root of 11778728 is about 227.5269251230.

The spelling of 11778728 in words is "eleven million, seven hundred seventy-eight thousand, seven hundred twenty-eight".