11988728 has 16 divisors (see below), whose sum is σ = 23027760. Its totient is φ = 5848000.

The previous prime is 11988721. The next prime is 11988737. The reversal of 11988728 is 82788911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11988721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17948 + ... + 18603.

It is an arithmetic number, because the mean of its divisors is an integer number (1439235).

Almost surely, 2^11988728 is an apocalyptic number.

It is an amenable number.

11988728 is a deficient number, since it is larger than the sum of its proper divisors (11039032).

11988728 is a wasteful number, since it uses less digits than its factorization.

11988728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36598 (or 36594 counting only the distinct ones).

The product of its digits is 64512, while the sum is 44.

The square root of 11988728 is about 3462.4742598321. The cubic root of 11988728 is about 228.8711415040.

The spelling of 11988728 in words is "eleven million, nine hundred eighty-eight thousand, seven hundred twenty-eight".