28012301 has 2 divisors, whose sum is σ = 28012302. Its totient is φ = 28012300.

The previous prime is 28012297. The next prime is 28012319. The reversal of 28012301 is 10321082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22791076 + 5221225 = 4774^2 + 2285^2 .

It is a cyclic number.

It is not a de Polignac number, because 28012301 - 2² = 28012297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28012301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28012351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14006150 + 14006151.

It is an arithmetic number, because the mean of its divisors is an integer number (14006151).

Almost surely, 2^28012301 is an apocalyptic number.

It is an amenable number.

28012301 is a deficient number, since it is larger than the sum of its proper divisors (1).

28012301 is an equidigital number, since it uses as much as digits as its factorization.

28012301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 28012301 is about 5292.6648297431. The cubic root of 28012301 is about 303.7033586308.

Adding to 28012301 its reverse (10321082), we get a palindrome (38333383).

The spelling of 28012301 in words is "twenty-eight million, twelve thousand, three hundred one".