28020110001 has 16 divisors (see below), whose sum is σ = 40253399424. Its totient is φ = 17234832384.

The previous prime is 28020109993. The next prime is 28020110051. The reversal of 28020110001 is 10001102082.

It is not a de Polignac number, because 28020110001 - 2³ = 28020109993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28020110051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90736 + ... + 253521.

It is an arithmetic number, because the mean of its divisors is an integer number (2515837464).

Almost surely, 2^28020110001 is an apocalyptic number.

It is an amenable number.

28020110001 is a deficient number, since it is larger than the sum of its proper divisors (12233289423).

28020110001 is a wasteful number, since it uses less digits than its factorization.

28020110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346360.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 28020110001 its reverse (10001102082), we get a palindrome (38021212083).

The spelling of 28020110001 in words is "twenty-eight billion, twenty million, one hundred ten thousand, one".