28807069 has 2 divisors, whose sum is σ = 28807070. Its totient is φ = 28807068.

The previous prime is 28807039. The next prime is 28807073. The reversal of 28807069 is 96070882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28676025 + 131044 = 5355^2 + 362^2 .

It is a cyclic number.

It is not a de Polignac number, because 28807069 - 2¹⁵ = 28774301 is a prime.

It is a super-2 number, since 2×28807069² = 1659694448741522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28807039) 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, 14403534 + 14403535.

It is an arithmetic number, because the mean of its divisors is an integer number (14403535).

Almost surely, 2^28807069 is an apocalyptic number.

It is an amenable number.

28807069 is a deficient number, since it is larger than the sum of its proper divisors (1).

28807069 is an equidigital number, since it uses as much as digits as its factorization.

28807069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 28807069 is about 5367.2217207788. The cubic root of 28807069 is about 306.5488498011.

The spelling of 28807069 in words is "twenty-eight million, eight hundred seven thousand, sixty-nine".