28321253 has 2 divisors, whose sum is σ = 28321254. Its totient is φ = 28321252.

The previous prime is 28321217. The next prime is 28321301. The reversal of 28321253 is 35212382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15697444 + 12623809 = 3962^2 + 3553^2 .

It is a cyclic number.

It is not a de Polignac number, because 28321253 - 2¹⁴ = 28304869 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28321753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14160626 + 14160627.

It is an arithmetic number, because the mean of its divisors is an integer number (14160627).

Almost surely, 2^28321253 is an apocalyptic number.

It is an amenable number.

28321253 is a deficient number, since it is larger than the sum of its proper divisors (1).

28321253 is an equidigital number, since it uses as much as digits as its factorization.

28321253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 28321253 is about 5321.7716035170. The cubic root of 28321253 is about 304.8158092403.

The spelling of 28321253 in words is "twenty-eight million, three hundred twenty-one thousand, two hundred fifty-three".