11728637 has 4 divisors (see below), whose sum is σ = 12001440. Its totient is φ = 11455836.

The previous prime is 11728631. The next prime is 11728649. The reversal of 11728637 is 73682711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11728637 - 2⁴ = 11728621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11728597 and 11728606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11728631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136337 + ... + 136422.

It is an arithmetic number, because the mean of its divisors is an integer number (3000360).

Almost surely, 2^11728637 is an apocalyptic number.

It is an amenable number.

11728637 is a deficient number, since it is larger than the sum of its proper divisors (272803).

11728637 is an equidigital number, since it uses as much as digits as its factorization.

11728637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272802.

The product of its digits is 14112, while the sum is 35.

The square root of 11728637 is about 3424.7097687249. The cubic root of 11728637 is about 227.2039348013.

The spelling of 11728637 in words is "eleven million, seven hundred twenty-eight thousand, six hundred thirty-seven".