28240049 has 2 divisors, whose sum is σ = 28240050. Its totient is φ = 28240048.

The previous prime is 28240027. The next prime is 28240057. The reversal of 28240049 is 94004282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24750625 + 3489424 = 4975^2 + 1868^2 .

It is a cyclic number.

It is not a de Polignac number, because 28240049 - 2¹⁶ = 28174513 is a prime.

It is not a weakly prime, because it can be changed into another prime (28240549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14120024 + 14120025.

It is an arithmetic number, because the mean of its divisors is an integer number (14120025).

Almost surely, 2^28240049 is an apocalyptic number.

It is an amenable number.

28240049 is a deficient number, since it is larger than the sum of its proper divisors (1).

28240049 is an equidigital number, since it uses as much as digits as its factorization.

28240049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28240049 is about 5314.1367125809. The cubic root of 28240049 is about 304.5242030548.

The spelling of 28240049 in words is "twenty-eight million, two hundred forty thousand, forty-nine".