28284313 has 2 divisors, whose sum is σ = 28284314. Its totient is φ = 28284312.

The previous prime is 28284299. The next prime is 28284349. The reversal of 28284313 is 31348282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26245129 + 2039184 = 5123^2 + 1428^2 .

It is a cyclic number.

It is not a de Polignac number, because 28284313 - 2¹³ = 28276121 is a prime.

It is not a weakly prime, because it can be changed into another prime (28284713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14142156 + 14142157.

It is an arithmetic number, because the mean of its divisors is an integer number (14142157).

Almost surely, 2^28284313 is an apocalyptic number.

It is an amenable number.

28284313 is a deficient number, since it is larger than the sum of its proper divisors (1).

28284313 is an equidigital number, since it uses as much as digits as its factorization.

28284313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 31.

The square root of 28284313 is about 5318.2998223116. The cubic root of 28284313 is about 304.6832257108.

The spelling of 28284313 in words is "twenty-eight million, two hundred eighty-four thousand, three hundred thirteen".