11828987 has 4 divisors (see below), whose sum is σ = 11836176. Its totient is φ = 11821800.

The previous prime is 11828983. The next prime is 11828989. The reversal of 11828987 is 78982811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 78982811 = 307 ⋅257273.

It is a cyclic number.

It is not a de Polignac number, because 11828987 - 2² = 11828983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11828981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233 + ... + 4869.

It is an arithmetic number, because the mean of its divisors is an integer number (2959044).

Almost surely, 2^11828987 is an apocalyptic number.

11828987 is a deficient number, since it is larger than the sum of its proper divisors (7189).

11828987 is an equidigital number, since it uses as much as digits as its factorization.

11828987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7188.

The product of its digits is 64512, while the sum is 44.

The square root of 11828987 is about 3439.3294404578. The cubic root of 11828987 is about 227.8500797022.

The spelling of 11828987 in words is "eleven million, eight hundred twenty-eight thousand, nine hundred eighty-seven".