28080101 has 4 divisors (see below), whose sum is σ = 32091552. Its totient is φ = 24068652.

The previous prime is 28080097. The next prime is 28080133. The reversal of 28080101 is 10108082.

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 28080101 - 2² = 28080097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28080181) 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, 2005715 + ... + 2005728.

It is an arithmetic number, because the mean of its divisors is an integer number (8022888).

Almost surely, 2^28080101 is an apocalyptic number.

It is an amenable number.

28080101 is a deficient number, since it is larger than the sum of its proper divisors (4011451).

28080101 is an equidigital number, since it uses as much as digits as its factorization.

28080101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4011450.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 28080101 is about 5299.0660497865. The cubic root of 28080101 is about 303.9481855655.

Adding to 28080101 its reverse (10108082), we get a palindrome (38188183).

The spelling of 28080101 in words is "twenty-eight million, eighty thousand, one hundred one".