11812728 has 32 divisors (see below), whose sum is σ = 29640960. Its totient is φ = 3923040.

The previous prime is 11812721. The next prime is 11812729. The reversal of 11812728 is 82721811.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11812695 and 11812704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11812721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7201 + ... + 8687.

It is an arithmetic number, because the mean of its divisors is an integer number (926280).

Almost surely, 2^11812728 is an apocalyptic number.

It is an amenable number.

11812728 is an abundant number, since it is smaller than the sum of its proper divisors (17828232).

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

11812728 is a wasteful number, since it uses less digits than its factorization.

11812728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827 (or 1823 counting only the distinct ones).

The product of its digits is 1792, while the sum is 30.

The square root of 11812728 is about 3436.9649401761. The cubic root of 11812728 is about 227.7456381559.

The spelling of 11812728 in words is "eleven million, eight hundred twelve thousand, seven hundred twenty-eight".