28200001001 has 4 divisors (see below), whose sum is σ = 29684211600. Its totient is φ = 26715790404.

The previous prime is 28200000991. The next prime is 28200001009. The reversal of 28200001001 is 10010000282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28200001001 - 2⁶ = 28200000937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28200001009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742105271 + ... + 742105308.

It is an arithmetic number, because the mean of its divisors is an integer number (7421052900).

Almost surely, 2^28200001001 is an apocalyptic number.

It is an amenable number.

28200001001 is a deficient number, since it is larger than the sum of its proper divisors (1484210599).

28200001001 is a wasteful number, since it uses less digits than its factorization.

28200001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484210598.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 28200001001 its reverse (10010000282), we get a palindrome (38210001283).

The spelling of 28200001001 in words is "twenty-eight billion, two hundred million, one thousand, one".