11428321 has 4 divisors (see below), whose sum is σ = 11448000. Its totient is φ = 11408644.

The previous prime is 11428297. The next prime is 11428331. The reversal of 11428321 is 12382411.

It is a happy number.

11428321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-11428321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11428292 and 11428301.

It is not an unprimeable number, because it can be changed into a prime (11428331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8941 + ... + 10138.

It is an arithmetic number, because the mean of its divisors is an integer number (2862000).

Almost surely, 2^11428321 is an apocalyptic number.

It is an amenable number.

11428321 is a deficient number, since it is larger than the sum of its proper divisors (19679).

11428321 is an equidigital number, since it uses as much as digits as its factorization.

11428321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19678.

The product of its digits is 384, while the sum is 22.

The square root of 11428321 is about 3380.5799798259. The cubic root of 11428321 is about 225.2479308163.

The spelling of 11428321 in words is "eleven million, four hundred twenty-eight thousand, three hundred twenty-one".