11828281 has 4 divisors (see below), whose sum is σ = 11848564. Its totient is φ = 11808000.

The previous prime is 11828273. The next prime is 11828287. The reversal of 11828281 is 18282811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18282811 = 233 ⋅78467.

It can be written as a sum of positive squares in 2 ways, for example, as 10989225 + 839056 = 3315^2 + 916^2 .

It is a cyclic number.

It is not a de Polignac number, because 11828281 - 2³ = 11828273 is a prime.

It is a super-2 number, since 2×11828281² = 279816462829922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11828287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9240 + ... + 10441.

It is an arithmetic number, because the mean of its divisors is an integer number (2962141).

Almost surely, 2^11828281 is an apocalyptic number.

It is an amenable number.

11828281 is a deficient number, since it is larger than the sum of its proper divisors (20283).

11828281 is an equidigital number, since it uses as much as digits as its factorization.

11828281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20282.

The product of its digits is 2048, while the sum is 31.

The square root of 11828281 is about 3439.2268026404. The cubic root of 11828281 is about 227.8455466187.

The spelling of 11828281 in words is "eleven million, eight hundred twenty-eight thousand, two hundred eighty-one".