11728623 has 16 divisors (see below), whose sum is σ = 16678656. Its totient is φ = 7305600.

The previous prime is 11728621. The next prime is 11728627. The reversal of 11728623 is 32682711.

It is not a de Polignac number, because 11728623 - 2¹ = 11728621 is a prime.

It is a super-2 number, since 2×11728623² = 275121194952258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11728621) 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 15 ways as a sum of consecutive naturals, for example, 6940 + ... + 8462.

It is an arithmetic number, because the mean of its divisors is an integer number (1042416).

Almost surely, 2^11728623 is an apocalyptic number.

11728623 is a deficient number, since it is larger than the sum of its proper divisors (4950033).

11728623 is a wasteful number, since it uses less digits than its factorization.

11728623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694.

The product of its digits is 4032, while the sum is 30.

The square root of 11728623 is about 3424.7077247555. The cubic root of 11728623 is about 227.2038443999.

The spelling of 11728623 in words is "eleven million, seven hundred twenty-eight thousand, six hundred twenty-three".