28015069 has 2 divisors, whose sum is σ = 28015070. Its totient is φ = 28015068.

The previous prime is 28015051. The next prime is 28015087. The reversal of 28015069 is 96051082.

It is a balanced prime because it is at equal distance from previous prime (28015051) and next prime (28015087).

It can be written as a sum of positive squares in only one way, i.e., 15327225 + 12687844 = 3915^2 + 3562^2 .

It is a cyclic number.

It is not a de Polignac number, because 28015069 - 2¹⁵ = 27982301 is a prime.

It is a super-2 number, since 2×28015069² = 1569688182149522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28015069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28015369) 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, 14007534 + 14007535.

It is an arithmetic number, because the mean of its divisors is an integer number (14007535).

Almost surely, 2^28015069 is an apocalyptic number.

It is an amenable number.

28015069 is a deficient number, since it is larger than the sum of its proper divisors (1).

28015069 is an equidigital number, since it uses as much as digits as its factorization.

28015069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 28015069 is about 5292.9263172653. The cubic root of 28015069 is about 303.7133616554.

The spelling of 28015069 in words is "twenty-eight million, fifteen thousand, sixty-nine".