28522069 has 2 divisors, whose sum is σ = 28522070. Its totient is φ = 28522068.

The previous prime is 28522009. The next prime is 28522099. The reversal of 28522069 is 96022582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24621444 + 3900625 = 4962^2 + 1975^2 .

It is a cyclic number.

It is not a de Polignac number, because 28522069 - 2⁹ = 28521557 is a prime.

It is a super-2 number, since 2×28522069² = 1627016840081522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28522009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14261034 + 14261035.

It is an arithmetic number, because the mean of its divisors is an integer number (14261035).

Almost surely, 2^28522069 is an apocalyptic number.

It is an amenable number.

28522069 is a deficient number, since it is larger than the sum of its proper divisors (1).

28522069 is an equidigital number, since it uses as much as digits as its factorization.

28522069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 28522069 is about 5340.6056772617. The cubic root of 28522069 is about 305.5345601785.

The spelling of 28522069 in words is "twenty-eight million, five hundred twenty-two thousand, sixty-nine".