28403849 has 2 divisors, whose sum is σ = 28403850. Its totient is φ = 28403848.

The previous prime is 28403833. The next prime is 28403863. The reversal of 28403849 is 94830482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22848400 + 5555449 = 4780^2 + 2357^2 .

It is a cyclic number.

It is not a de Polignac number, because 28403849 - 2⁴ = 28403833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28403449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14201924 + 14201925.

It is an arithmetic number, because the mean of its divisors is an integer number (14201925).

Almost surely, 2^28403849 is an apocalyptic number.

It is an amenable number.

28403849 is a deficient number, since it is larger than the sum of its proper divisors (1).

28403849 is an equidigital number, since it uses as much as digits as its factorization.

28403849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 28403849 is about 5329.5261515448. The cubic root of 28403849 is about 305.1118428846. Note that the first 3 decimals are identical.

The spelling of 28403849 in words is "twenty-eight million, four hundred three thousand, eight hundred forty-nine".