28204201 has 2 divisors, whose sum is σ = 28204202. Its totient is φ = 28204200.

The previous prime is 28204193. The next prime is 28204217. The reversal of 28204201 is 10240282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25050025 + 3154176 = 5005^2 + 1776^2 .

It is a cyclic number.

It is not a de Polignac number, because 28204201 - 2³ = 28204193 is a prime.

It is not a weakly prime, because it can be changed into another prime (28204261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14102100 + 14102101.

It is an arithmetic number, because the mean of its divisors is an integer number (14102101).

Almost surely, 2^28204201 is an apocalyptic number.

It is an amenable number.

28204201 is a deficient number, since it is larger than the sum of its proper divisors (1).

28204201 is an equidigital number, since it uses as much as digits as its factorization.

28204201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 28204201 is about 5310.7627512439. The cubic root of 28204201 is about 304.3952938583.

Adding to 28204201 its reverse (10240282), we get a palindrome (38444483).

It can be divided in two parts, 2820 and 4201, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 28204201 in words is "twenty-eight million, two hundred four thousand, two hundred one".