28741729 has 2 divisors, whose sum is σ = 28741730. Its totient is φ = 28741728.

The previous prime is 28741649. The next prime is 28741733. The reversal of 28741729 is 92714782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28601104 + 140625 = 5348^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 28741729 - 2⁹ = 28741217 is a prime.

It is equal to p_1784686 and since 28741729 and 1784686 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 = 28741691 and 28741700.

It is not a weakly prime, because it can be changed into another prime (28741829) 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, 14370864 + 14370865.

It is an arithmetic number, because the mean of its divisors is an integer number (14370865).

Almost surely, 2^28741729 is an apocalyptic number.

It is an amenable number.

28741729 is a deficient number, since it is larger than the sum of its proper divisors (1).

28741729 is an equidigital number, since it uses as much as digits as its factorization.

28741729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 28741729 is about 5361.1313171755. The cubic root of 28741729 is about 306.3169036671.

The spelling of 28741729 in words is "twenty-eight million, seven hundred forty-one thousand, seven hundred twenty-nine".