28516101 has 4 divisors (see below), whose sum is σ = 38021472. Its totient is φ = 19010732.

The previous prime is 28516099. The next prime is 28516121. The reversal of 28516101 is 10161582.

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 28516101 - 2¹ = 28516099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28516121) 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 in 3 ways as a sum of consecutive naturals, for example, 4752681 + ... + 4752686.

It is an arithmetic number, because the mean of its divisors is an integer number (9505368).

Almost surely, 2^28516101 is an apocalyptic number.

It is an amenable number.

28516101 is a deficient number, since it is larger than the sum of its proper divisors (9505371).

28516101 is an equidigital number, since it uses as much as digits as its factorization.

28516101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9505370.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 28516101 is about 5340.0469099063. The cubic root of 28516101 is about 305.5132485239.

Adding to 28516101 its reverse (10161582), we get a palindrome (38677683).

The spelling of 28516101 in words is "twenty-eight million, five hundred sixteen thousand, one hundred one".