28003250005 has 4 divisors (see below), whose sum is σ = 33603900012. Its totient is φ = 22402600000.

The previous prime is 28003249991. The next prime is 28003250027. The reversal of 28003250005 is 50005230082.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10340042596 + 17663207409 = 101686^2 + 132903^2 .

It is not a de Polignac number, because 28003250005 - 2²³ = 27994861397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2800324996 + ... + 2800325005.

It is an arithmetic number, because the mean of its divisors is an integer number (8400975003).

Almost surely, 2^28003250005 is an apocalyptic number.

It is an amenable number.

28003250005 is a deficient number, since it is larger than the sum of its proper divisors (5600650007).

28003250005 is an equidigital number, since it uses as much as digits as its factorization.

28003250005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5600650006.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 28003250005 its reverse (50005230082), we get a palindrome (78008480087).

The spelling of 28003250005 in words is "twenty-eight billion, three million, two hundred fifty thousand, five".