28418329 has 2 divisors, whose sum is σ = 28418330. Its totient is φ = 28418328.

The previous prime is 28418303. The next prime is 28418333. The reversal of 28418329 is 92381482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28090000 + 328329 = 5300^2 + 573^2 .

It is a cyclic number.

It is not a de Polignac number, because 28418329 - 2¹¹ = 28416281 is a prime.

It is not a weakly prime, because it can be changed into another prime (28418359) 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, 14209164 + 14209165.

It is an arithmetic number, because the mean of its divisors is an integer number (14209165).

Almost surely, 2^28418329 is an apocalyptic number.

It is an amenable number.

28418329 is a deficient number, since it is larger than the sum of its proper divisors (1).

28418329 is an equidigital number, since it uses as much as digits as its factorization.

28418329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 37.

The square root of 28418329 is about 5330.8844481943. The cubic root of 28418329 is about 305.1636817386.

The spelling of 28418329 in words is "twenty-eight million, four hundred eighteen thousand, three hundred twenty-nine".