28602281 has 2 divisors, whose sum is σ = 28602282. Its totient is φ = 28602280.

The previous prime is 28602251. The next prime is 28602283. The reversal of 28602281 is 18220682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16933225 + 11669056 = 4115^2 + 3416^2 .

It is a cyclic number.

It is not a de Polignac number, because 28602281 - 2¹⁰ = 28601257 is a prime.

It is a super-2 number, since 2×28602281² = 1636180956805922, which contains 22 as substring.

Together with 28602283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28602283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14301140 + 14301141.

It is an arithmetic number, because the mean of its divisors is an integer number (14301141).

Almost surely, 2^28602281 is an apocalyptic number.

It is an amenable number.

28602281 is a deficient number, since it is larger than the sum of its proper divisors (1).

28602281 is an equidigital number, since it uses as much as digits as its factorization.

28602281 is an odious number, because the sum of its binary digits is odd.

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

The square root of 28602281 is about 5348.1100400048. The cubic root of 28602281 is about 305.8207081897.

The spelling of 28602281 in words is "twenty-eight million, six hundred two thousand, two hundred eighty-one".