28000201 has 8 divisors (see below), whose sum is σ = 28476360. Its totient is φ = 27527808.

The previous prime is 28000187. The next prime is 28000237. The reversal of 28000201 is 10200082.

It can be written as a sum of positive squares in 4 ways, for example, as 4000000 + 24000201 = 2000^2 + 4899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28000201 - 2⁷ = 28000073 is a prime.

It is a super-2 number, since 2×28000201² = 1568022512080802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28001201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16735 + ... + 18331.

It is an arithmetic number, because the mean of its divisors is an integer number (3559545).

Almost surely, 2^28000201 is an apocalyptic number.

It is an amenable number.

28000201 is a deficient number, since it is larger than the sum of its proper divisors (476159).

28000201 is a wasteful number, since it uses less digits than its factorization.

28000201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 28000201 is about 5291.5216148099. The cubic root of 28000201 is about 303.6596237982.

Adding to 28000201 its reverse (10200082), we get a palindrome (38200283).

The spelling of 28000201 in words is "twenty-eight million, two hundred one", and thus it is an aban number.