28280280101 has 2 divisors, whose sum is σ = 28280280102. Its totient is φ = 28280280100.

The previous prime is 28280280053. The next prime is 28280280109. The reversal of 28280280101 is 10108208282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18885630625 + 9394649476 = 137425^2 + 96926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28280280101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28280280109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14140140050 + 14140140051.

It is an arithmetic number, because the mean of its divisors is an integer number (14140140051).

Almost surely, 2^28280280101 is an apocalyptic number.

It is an amenable number.

28280280101 is a deficient number, since it is larger than the sum of its proper divisors (1).

28280280101 is an equidigital number, since it uses as much as digits as its factorization.

28280280101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4096, while the sum is 32.

Adding to 28280280101 its reverse (10108208282), we get a palindrome (38388488383).

The spelling of 28280280101 in words is "twenty-eight billion, two hundred eighty million, two hundred eighty thousand, one hundred one".