28838243011 has 4 divisors (see below), whose sum is σ = 28838677024. Its totient is φ = 28837809000.

The previous prime is 28838242991. The next prime is 28838243023. The reversal of 28838243011 is 11034283882.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28838243011 - 2²⁷ = 28704025283 is a prime.

It is a super-2 number, since 2×28838243011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28838243711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94155 + ... + 257956.

It is an arithmetic number, because the mean of its divisors is an integer number (7209669256).

Almost surely, 2^28838243011 is an apocalyptic number.

28838243011 is a deficient number, since it is larger than the sum of its proper divisors (434013).

28838243011 is an equidigital number, since it uses as much as digits as its factorization.

28838243011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434012.

The product of its (nonzero) digits is 73728, while the sum is 40.

The spelling of 28838243011 in words is "twenty-eight billion, eight hundred thirty-eight million, two hundred forty-three thousand, eleven".