28444253 has 2 divisors, whose sum is σ = 28444254. Its totient is φ = 28444252.

The previous prime is 28444243. The next prime is 28444271. The reversal of 28444253 is 35244482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28440889 + 3364 = 5333^2 + 58^2 .

It is a cyclic number.

It is not a de Polignac number, because 28444253 - 2⁶ = 28444189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28444223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14222126 + 14222127.

It is an arithmetic number, because the mean of its divisors is an integer number (14222127).

Almost surely, 2^28444253 is an apocalyptic number.

It is an amenable number.

28444253 is a deficient number, since it is larger than the sum of its proper divisors (1).

28444253 is an equidigital number, since it uses as much as digits as its factorization.

28444253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 32.

The square root of 28444253 is about 5333.3153853865. The cubic root of 28444253 is about 305.2564465048.

The spelling of 28444253 in words is "twenty-eight million, four hundred forty-four thousand, two hundred fifty-three".