28346729 has 2 divisors, whose sum is σ = 28346730. Its totient is φ = 28346728.

The previous prime is 28346711. The next prime is 28346743. The reversal of 28346729 is 92764382.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24552025 + 3794704 = 4955^2 + 1948^2 .

It is a cyclic number.

It is not a de Polignac number, because 28346729 - 2⁸ = 28346473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28346749) 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, 14173364 + 14173365.

It is an arithmetic number, because the mean of its divisors is an integer number (14173365).

Almost surely, 2^28346729 is an apocalyptic number.

It is an amenable number.

28346729 is a deficient number, since it is larger than the sum of its proper divisors (1).

28346729 is an equidigital number, since it uses as much as digits as its factorization.

28346729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 28346729 is about 5324.1646293104. The cubic root of 28346729 is about 304.9071794947.

The spelling of 28346729 in words is "twenty-eight million, three hundred forty-six thousand, seven hundred twenty-nine".