28430201 has 2 divisors, whose sum is σ = 28430202. Its totient is φ = 28430200.

The previous prime is 28430197. The next prime is 28430219. The reversal of 28430201 is 10203482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26677225 + 1752976 = 5165^2 + 1324^2 .

It is a cyclic number.

It is not a de Polignac number, because 28430201 - 2² = 28430197 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28430291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14215100 + 14215101.

It is an arithmetic number, because the mean of its divisors is an integer number (14215101).

Almost surely, 2^28430201 is an apocalyptic number.

It is an amenable number.

28430201 is a deficient number, since it is larger than the sum of its proper divisors (1).

28430201 is an equidigital number, since it uses as much as digits as its factorization.

28430201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 28430201 is about 5331.9978432104. The cubic root of 28430201 is about 305.2061707351.

Adding to 28430201 its reverse (10203482), we get a palindrome (38633683).

The spelling of 28430201 in words is "twenty-eight million, four hundred thirty thousand, two hundred one".