28630201 has 4 divisors (see below), whose sum is σ = 28822500. Its totient is φ = 28437904.

The previous prime is 28630187. The next prime is 28630211. The reversal of 28630201 is 10203682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10203682 = 2 ⋅5101841.

It can be written as a sum of positive squares in 2 ways, for example, as 5359225 + 23270976 = 2315^2 + 4824^2 .

It is a cyclic number.

It is not a de Polignac number, because 28630201 - 2²¹ = 26533049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28630211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95926 + ... + 96223.

It is an arithmetic number, because the mean of its divisors is an integer number (7205625).

Almost surely, 2^28630201 is an apocalyptic number.

It is an amenable number.

28630201 is a deficient number, since it is larger than the sum of its proper divisors (192299).

28630201 is a wasteful number, since it uses less digits than its factorization.

28630201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192298.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 28630201 is about 5350.7196712218. The cubic root of 28630201 is about 305.9201843748.

Adding to 28630201 its reverse (10203682), we get a palindrome (38833883).

The spelling of 28630201 in words is "twenty-eight million, six hundred thirty thousand, two hundred one".