28628201 has 6 divisors (see below), whose sum is σ = 33302250. Its totient is φ = 24538416.

The previous prime is 28628177. The next prime is 28628203. The reversal of 28628201 is 10282682.

It can be written as a sum of positive squares in only one way, i.e., 24010000 + 4618201 = 4900^2 + 2149^2 .

It is not a de Polignac number, because 28628201 - 2¹⁰ = 28627177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28628203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 292076 + ... + 292173.

It is an arithmetic number, because the mean of its divisors is an integer number (5550375).

Almost surely, 2^28628201 is an apocalyptic number.

It is an amenable number.

28628201 is a deficient number, since it is larger than the sum of its proper divisors (4674049).

28628201 is an equidigital number, since it uses as much as digits as its factorization.

28628201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584263 (or 584256 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28628201 is about 5350.5327772101. The cubic root of 28628201 is about 305.9130607245.

The spelling of 28628201 in words is "twenty-eight million, six hundred twenty-eight thousand, two hundred one".