11928321 has 12 divisors (see below), whose sum is σ = 17267172. Its totient is φ = 7934976.

The previous prime is 11928317. The next prime is 11928331. The reversal of 11928321 is 12382911.

It can be written as a sum of positive squares in 2 ways, for example, as 9678321 + 2250000 = 3111^2 + 1500^2 .

It is not a de Polignac number, because 11928321 - 2² = 11928317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11928331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4045 + ... + 6341.

It is an arithmetic number, because the mean of its divisors is an integer number (1438931).

Almost surely, 2^11928321 is an apocalyptic number.

It is an amenable number.

11928321 is a deficient number, since it is larger than the sum of its proper divisors (5338851).

11928321 is a wasteful number, since it uses less digits than its factorization.

11928321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880 (or 2877 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 11928321 is about 3453.7401465657. The cubic root of 11928321 is about 228.4860935728.

The spelling of 11928321 in words is "eleven million, nine hundred twenty-eight thousand, three hundred twenty-one".