28788101 has 2 divisors, whose sum is σ = 28788102. Its totient is φ = 28788100.

The previous prime is 28788079. The next prime is 28788103. The reversal of 28788101 is 10188782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26275876 + 2512225 = 5126^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 28788101 - 2⁶ = 28788037 is a prime.

Together with 28788103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28788103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14394050 + 14394051.

It is an arithmetic number, because the mean of its divisors is an integer number (14394051).

Almost surely, 2^28788101 is an apocalyptic number.

It is an amenable number.

28788101 is a deficient number, since it is larger than the sum of its proper divisors (1).

28788101 is an equidigital number, since it uses as much as digits as its factorization.

28788101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 28788101 is about 5365.4544075968. The cubic root of 28788101 is about 306.4815527167.

It can be divided in two parts, 287 and 88101, that added together give a palindrome (88388).

The spelling of 28788101 in words is "twenty-eight million, seven hundred eighty-eight thousand, one hundred one".