28513201 has 8 divisors (see below), whose sum is σ = 28892160. Its totient is φ = 28136592.

The previous prime is 28513187. The next prime is 28513207. The reversal of 28513201 is 10231582.

28513201 is nontrivially palindromic in base 16.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28513201 - 2¹⁹ = 27988913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28513207) 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 7 ways as a sum of consecutive naturals, for example, 41406 + ... + 42088.

It is an arithmetic number, because the mean of its divisors is an integer number (3611520).

Almost surely, 2^28513201 is an apocalyptic number.

It is an amenable number.

28513201 is a deficient number, since it is larger than the sum of its proper divisors (378959).

28513201 is a wasteful number, since it uses less digits than its factorization.

28513201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 28513201 is about 5339.7753698072. The cubic root of 28513201 is about 305.5028915860.

Adding to 28513201 its reverse (10231582), we get a palindrome (38744783).

The spelling of 28513201 in words is "twenty-eight million, five hundred thirteen thousand, two hundred one".