28504249 has 2 divisors, whose sum is σ = 28504250. Its totient is φ = 28504248.

The previous prime is 28504243. The next prime is 28504253. The reversal of 28504249 is 94240582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26832400 + 1671849 = 5180^2 + 1293^2 .

It is a cyclic number.

It is not a de Polignac number, because 28504249 - 2⁹ = 28503737 is a prime.

It is a super-3 number, since 3×28504249³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (28504243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14252124 + 14252125.

It is an arithmetic number, because the mean of its divisors is an integer number (14252125).

Almost surely, 2^28504249 is an apocalyptic number.

It is an amenable number.

28504249 is a deficient number, since it is larger than the sum of its proper divisors (1).

28504249 is an equidigital number, since it uses as much as digits as its factorization.

28504249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 28504249 is about 5338.9370664955. The cubic root of 28504249 is about 305.4709163599.

The spelling of 28504249 in words is "twenty-eight million, five hundred four thousand, two hundred forty-nine".