11715728 has 10 divisors (see below), whose sum is σ = 22699254. Its totient is φ = 5857856.

The previous prime is 11715713. The next prime is 11715731. The reversal of 11715728 is 82751711.

It can be written as a sum of positive squares in only one way, i.e., 11641744 + 73984 = 3412^2 + 272^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11715694 and 11715703.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 366101 + ... + 366132.

Almost surely, 2^11715728 is an apocalyptic number.

It is an amenable number.

11715728 is a deficient number, since it is larger than the sum of its proper divisors (10983526).

11715728 is an equidigital number, since it uses as much as digits as its factorization.

11715728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732241 (or 732235 counting only the distinct ones).

The product of its digits is 3920, while the sum is 32.

The square root of 11715728 is about 3422.8245645957. The cubic root of 11715728 is about 227.1205476666.

The spelling of 11715728 in words is "eleven million, seven hundred fifteen thousand, seven hundred twenty-eight".