11728031 has 8 divisors (see below), whose sum is σ = 13474464. Its totient is φ = 9999360.

The previous prime is 11728021. The next prime is 11728033. The reversal of 11728031 is 13082711.

It is a happy number.

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

It is not a de Polignac number, because 11728031 - 2²² = 7533727 is a prime.

It is a super-2 number, since 2×11728031² = 275093422273922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11727988 and 11728006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11728033) 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, 2990 + ... + 5691.

It is an arithmetic number, because the mean of its divisors is an integer number (1684308).

Almost surely, 2^11728031 is an apocalyptic number.

11728031 is a deficient number, since it is larger than the sum of its proper divisors (1746433).

11728031 is an equidigital number, since it uses as much as digits as its factorization.

11728031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8881.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 11728031 is about 3424.6212929315. The cubic root of 11728031 is about 227.2000216454.

The spelling of 11728031 in words is "eleven million, seven hundred twenty-eight thousand, thirty-one".