28260329 has 2 divisors, whose sum is σ = 28260330. Its totient is φ = 28260328.

The previous prime is 28260319. The next prime is 28260361. The reversal of 28260329 is 92306282.

It is an a-pointer prime, because the next prime (28260361) can be obtained adding 28260329 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22306729 + 5953600 = 4723^2 + 2440^2 .

It is a cyclic number.

It is not a de Polignac number, because 28260329 - 2²⁰ = 27211753 is a prime.

It is equal to p_1756616 and since 28260329 and 1756616 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 28260295 and 28260304.

It is not a weakly prime, because it can be changed into another prime (28260319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14130164 + 14130165.

It is an arithmetic number, because the mean of its divisors is an integer number (14130165).

Almost surely, 2^28260329 is an apocalyptic number.

It is an amenable number.

28260329 is a deficient number, since it is larger than the sum of its proper divisors (1).

28260329 is an equidigital number, since it uses as much as digits as its factorization.

28260329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 28260329 is about 5316.0444881509. The cubic root of 28260329 is about 304.5970815060.

The spelling of 28260329 in words is "twenty-eight million, two hundred sixty thousand, three hundred twenty-nine".