11909728 has 12 divisors (see below), whose sum is σ = 23447340. Its totient is φ = 5954848.

The previous prime is 11909717. The next prime is 11909747. The reversal of 11909728 is 82790911.

11909728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186058 + ... + 186121.

It is an arithmetic number, because the mean of its divisors is an integer number (1953945).

Almost surely, 2^11909728 is an apocalyptic number.

It is an amenable number.

11909728 is a deficient number, since it is larger than the sum of its proper divisors (11537612).

11909728 is an equidigital number, since it uses as much as digits as its factorization.

11909728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372189 (or 372181 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 11909728 is about 3451.0473772465. The cubic root of 11909728 is about 228.3673159975.

The spelling of 11909728 in words is "eleven million, nine hundred nine thousand, seven hundred twenty-eight".