28687201 has 2 divisors, whose sum is σ = 28687202. Its totient is φ = 28687200.

The previous prime is 28687199. The next prime is 28687213. The reversal of 28687201 is 10278682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28344976 + 342225 = 5324^2 + 585^2 .

It is a cyclic number.

It is not a de Polignac number, because 28687201 - 2¹ = 28687199 is a prime.

Together with 28687199, it forms a pair of twin primes.

It is equal to p_1781548 and since 28687201 and 1781548 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28687231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14343600 + 14343601.

It is an arithmetic number, because the mean of its divisors is an integer number (14343601).

Almost surely, 2^28687201 is an apocalyptic number.

It is an amenable number.

28687201 is a deficient number, since it is larger than the sum of its proper divisors (1).

28687201 is an equidigital number, since it uses as much as digits as its factorization.

28687201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 28687201 is about 5356.0434090847. The cubic root of 28687201 is about 306.1230690977.

The spelling of 28687201 in words is "twenty-eight million, six hundred eighty-seven thousand, two hundred one".