11688728 has 8 divisors (see below), whose sum is σ = 21916380. Its totient is φ = 5844360.

The previous prime is 11688727. The next prime is 11688751. The reversal of 11688728 is 82788611.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11688727) by changing a digit.

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 as a sum of consecutive naturals, namely, 730538 + ... + 730553.

Almost surely, 2^11688728 is an apocalyptic number.

It is an amenable number.

11688728 is a deficient number, since it is larger than the sum of its proper divisors (10227652).

11688728 is a wasteful number, since it uses less digits than its factorization.

11688728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461097 (or 1461093 counting only the distinct ones).

The product of its digits is 43008, while the sum is 41.

The square root of 11688728 is about 3418.8781785843. The cubic root of 11688728 is about 226.9459398911.

The spelling of 11688728 in words is "eleven million, six hundred eighty-eight thousand, seven hundred twenty-eight".