11328409 has 8 divisors (see below), whose sum is σ = 12038760. Its totient is φ = 10622976.

The previous prime is 11328407. The next prime is 11328419. The reversal of 11328409 is 90482311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 38809 + 11289600 = 197^2 + 3360^2 .

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

It is a 4-Lehmer number, since φ(11328409) divides (11328409-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 11328409 - 2¹ = 11328407 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (11328403) 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, 4257 + ... + 6385.

It is an arithmetic number, because the mean of its divisors is an integer number (1504845).

It is a Poulet number, since it divides 2^11328408-1.

Almost surely, 2^11328409 is an apocalyptic number.

11328409 is the 2129-th heptagonal number.

It is an amenable number.

11328409 is a deficient number, since it is larger than the sum of its proper divisors (710351).

11328409 is a wasteful number, since it uses less digits than its factorization.

11328409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 11328409 is about 3365.7701941755. The cubic root of 11328409 is about 224.5895992077.

The spelling of 11328409 in words is "eleven million, three hundred twenty-eight thousand, four hundred nine".