28136201 has 8 divisors (see below), whose sum is σ = 28591680. Its totient is φ = 27684432.

The previous prime is 28136191. The next prime is 28136203. The reversal of 28136201 is 10263182.

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 28136201 - 2⁶ = 28136137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28136203) 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, 17030 + ... + 18608.

It is an arithmetic number, because the mean of its divisors is an integer number (3573960).

Almost surely, 2^28136201 is an apocalyptic number.

It is an amenable number.

28136201 is a deficient number, since it is larger than the sum of its proper divisors (455479).

28136201 is a wasteful number, since it uses less digits than its factorization.

28136201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 28136201 is about 5304.3567941834. The cubic root of 28136201 is about 304.1504658246.

Adding to 28136201 its reverse (10263182), we get a palindrome (38399383).

The spelling of 28136201 in words is "twenty-eight million, one hundred thirty-six thousand, two hundred one".