11728291 has 4 divisors (see below), whose sum is σ = 11836000. Its totient is φ = 11620584.

The previous prime is 11728289. The next prime is 11728307. The reversal of 11728291 is 19282711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19282711 = 7 ⋅2754673.

It is a cyclic number.

It is not a de Polignac number, because 11728291 - 2¹ = 11728289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11728271) 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, 53691 + ... + 53908.

It is an arithmetic number, because the mean of its divisors is an integer number (2959000).

Almost surely, 2^11728291 is an apocalyptic number.

11728291 is a deficient number, since it is larger than the sum of its proper divisors (107709).

11728291 is a wasteful number, since it uses less digits than its factorization.

11728291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107708.

The product of its digits is 2016, while the sum is 31.

The square root of 11728291 is about 3424.6592531229. The cubic root of 11728291 is about 227.2017005737.

The spelling of 11728291 in words is "eleven million, seven hundred twenty-eight thousand, two hundred ninety-one".