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28075669 is a prime number
BaseRepresentation
bin110101100011…
…0011010010101
31221211101120121
41223012122111
524141410134
62441431541
7460432156
oct153063225
957741517
1028075669
1114936736
12949b5b1
135a8012b
143a2b92d
1526e8ab4
hex1ac6695

28075669 has 2 divisors, whose sum is σ = 28075670. Its totient is φ = 28075668.

The previous prime is 28075657. The next prime is 28075699. The reversal of 28075669 is 96657082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26780625 + 1295044 = 5175^2 + 1138^2 .

It is a cyclic number.

It is not a de Polignac number, because 28075669 - 221 = 25978517 is a prime.

It is a super-2 number, since 2×280756692 = 1576486379595122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28075699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14037834 + 14037835.

It is an arithmetic number, because the mean of its divisors is an integer number (14037835).

Almost surely, 228075669 is an apocalyptic number.

It is an amenable number.

28075669 is a deficient number, since it is larger than the sum of its proper divisors (1).

28075669 is an equidigital number, since it uses as much as digits as its factorization.

28075669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 28075669 is about 5298.6478463850. The cubic root of 28075669 is about 303.9321935855.

The spelling of 28075669 in words is "twenty-eight million, seventy-five thousand, six hundred sixty-nine".