28943800729 has 2 divisors, whose sum is σ = 28943800730. Its totient is φ = 28943800728.

The previous prime is 28943800679. The next prime is 28943800763. The reversal of 28943800729 is 92700834982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24227545104 + 4716255625 = 155652^2 + 68675^2 .

It is a cyclic number.

It is not a de Polignac number, because 28943800729 - 2¹⁵ = 28943767961 is a prime.

It is not a weakly prime, because it can be changed into another prime (28943800799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14471900364 + 14471900365.

It is an arithmetic number, because the mean of its divisors is an integer number (14471900365).

Almost surely, 2^28943800729 is an apocalyptic number.

It is an amenable number.

28943800729 is a deficient number, since it is larger than the sum of its proper divisors (1).

28943800729 is an equidigital number, since it uses as much as digits as its factorization.

28943800729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 28943800729 in words is "twenty-eight billion, nine hundred forty-three million, eight hundred thousand, seven hundred twenty-nine".