28751329 has 2 divisors, whose sum is σ = 28751330. Its totient is φ = 28751328.

The previous prime is 28751323. The next prime is 28751347. The reversal of 28751329 is 92315782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26419600 + 2331729 = 5140^2 + 1527^2 .

It is a cyclic number.

It is not a de Polignac number, because 28751329 - 2⁷ = 28751201 is a prime.

It is not a weakly prime, because it can be changed into another prime (28751323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14375664 + 14375665.

It is an arithmetic number, because the mean of its divisors is an integer number (14375665).

Almost surely, 2^28751329 is an apocalyptic number.

It is an amenable number.

28751329 is a deficient number, since it is larger than the sum of its proper divisors (1).

28751329 is an equidigital number, since it uses as much as digits as its factorization.

28751329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 28751329 is about 5362.0265758387. The cubic root of 28751329 is about 306.3510040853.

The spelling of 28751329 in words is "twenty-eight million, seven hundred fifty-one thousand, three hundred twenty-nine".