28284253 has 2 divisors, whose sum is σ = 28284254. Its totient is φ = 28284252.

The previous prime is 28284247. The next prime is 28284257. The reversal of 28284253 is 35248282.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22024249 + 6260004 = 4693^2 + 2502^2 .

It is a cyclic number.

It is not a de Polignac number, because 28284253 - 2⁹ = 28283741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28284257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14142126 + 14142127.

It is an arithmetic number, because the mean of its divisors is an integer number (14142127).

Almost surely, 2^28284253 is an apocalyptic number.

It is an amenable number.

28284253 is a deficient number, since it is larger than the sum of its proper divisors (1).

28284253 is an equidigital number, since it uses as much as digits as its factorization.

28284253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 34.

The square root of 28284253 is about 5318.2941814082. The cubic root of 28284253 is about 304.6830102674.

The spelling of 28284253 in words is "twenty-eight million, two hundred eighty-four thousand, two hundred fifty-three".