28634201 has 2 divisors, whose sum is σ = 28634202. Its totient is φ = 28634200.

The previous prime is 28634183. The next prime is 28634213. The reversal of 28634201 is 10243682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22080601 + 6553600 = 4699^2 + 2560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28634201 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 (28634251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14317100 + 14317101.

It is an arithmetic number, because the mean of its divisors is an integer number (14317101).

Almost surely, 2^28634201 is an apocalyptic number.

It is an amenable number.

28634201 is a deficient number, since it is larger than the sum of its proper divisors (1).

28634201 is an equidigital number, since it uses as much as digits as its factorization.

28634201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 28634201 is about 5351.0934396626. The cubic root of 28634201 is about 305.9344306801.

Adding to 28634201 its reverse (10243682), we get a palindrome (38877883).

The spelling of 28634201 in words is "twenty-eight million, six hundred thirty-four thousand, two hundred one".