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BaseRepresentation
bin11110101000001010001001
3120002220110022
4132220022021
54023410214
6444030225
7125146415
oct36501211
916086408
108028809
114594188
122832375
131881599
1410cdd45
15a88d8e
hex7a8289

8028809 has 2 divisors, whose sum is σ = 8028810. Its totient is φ = 8028808.

The previous prime is 8028799. The next prime is 8028827. The reversal of 8028809 is 9088208.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4687225 + 3341584 = 2165^2 + 1828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-8028809 is a prime.

It is not a weakly prime, because it can be changed into another prime (8028899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4014404 + 4014405.

It is an arithmetic number, because the mean of its divisors is an integer number (4014405).

Almost surely, 28028809 is an apocalyptic number.

It is an amenable number.

8028809 is a deficient number, since it is larger than the sum of its proper divisors (1).

8028809 is an equidigital number, since it uses as much as digits as its factorization.

8028809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 8028809 is about 2833.5153078817. The cubic root of 8028809 is about 200.2397873951.

The spelling of 8028809 in words is "eight million, twenty-eight thousand, eight hundred nine".