28105201 has 8 divisors (see below), whose sum is σ = 29176704. Its totient is φ = 27053520.

The previous prime is 28105183. The next prime is 28105229. The reversal of 28105201 is 10250182.

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 28105201 - 2¹⁵ = 28072433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28105291) 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, 2035 + ... + 7768.

It is an arithmetic number, because the mean of its divisors is an integer number (3647088).

Almost surely, 2^28105201 is an apocalyptic number.

It is an amenable number.

28105201 is a deficient number, since it is larger than the sum of its proper divisors (1071503).

28105201 is an equidigital number, since it uses as much as digits as its factorization.

28105201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9911.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 28105201 is about 5301.4338626451. The cubic root of 28105201 is about 304.0387221278.

Adding to 28105201 its reverse (10250182), we get a palindrome (38355383).

The spelling of 28105201 in words is "twenty-eight million, one hundred five thousand, two hundred one".