11728491 has 8 divisors (see below), whose sum is σ = 16461120. Its totient is φ = 7407432.

The previous prime is 11728439. The next prime is 11728523. The reversal of 11728491 is 19482711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11728491 - 2⁷ = 11728363 is a prime.

It is a super-2 number, since 2×11728491² = 275115002274162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11728411) 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, 102825 + ... + 102938.

It is an arithmetic number, because the mean of its divisors is an integer number (2057640).

Almost surely, 2^11728491 is an apocalyptic number.

11728491 is a deficient number, since it is larger than the sum of its proper divisors (4732629).

11728491 is a wasteful number, since it uses less digits than its factorization.

11728491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205785.

The product of its digits is 4032, while the sum is 33.

The square root of 11728491 is about 3424.6884529837. The cubic root of 11728491 is about 227.2029920401.

The spelling of 11728491 in words is "eleven million, seven hundred twenty-eight thousand, four hundred ninety-one".