11280409 has 8 divisors (see below), whose sum is σ = 13074048. Its totient is φ = 9532320.

The previous prime is 11280407. The next prime is 11280413. The reversal of 11280409 is 90408211.

It is a happy number.

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

It is not a de Polignac number, because 11280409 - 2¹ = 11280407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11280403) 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, 10852 + ... + 11845.

It is an arithmetic number, because the mean of its divisors is an integer number (1634256).

Almost surely, 2^11280409 is an apocalyptic number.

It is an amenable number.

11280409 is a deficient number, since it is larger than the sum of its proper divisors (1793639).

11280409 is an equidigital number, since it uses as much as digits as its factorization.

11280409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22775.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 11280409 is about 3358.6320131863. The cubic root of 11280409 is about 224.2719446407.

The spelling of 11280409 in words is "eleven million, two hundred eighty thousand, four hundred nine".