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28660717 is a prime number
BaseRepresentation
bin110110101010…
…1001111101101
31222221010010001
41231111033231
524314120332
62502144301
7465416641
oct155251755
958833101
1028660717
11151a6248
129722091
135c26507
143b40c21
1527b20e7
hex1b553ed

28660717 has 2 divisors, whose sum is σ = 28660718. Its totient is φ = 28660716.

The previous prime is 28660679. The next prime is 28660727. The reversal of 28660717 is 71706682.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25664356 + 2996361 = 5066^2 + 1731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-28660717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28660727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14330358 + 14330359.

It is an arithmetic number, because the mean of its divisors is an integer number (14330359).

Almost surely, 228660717 is an apocalyptic number.

It is an amenable number.

28660717 is a deficient number, since it is larger than the sum of its proper divisors (1).

28660717 is an equidigital number, since it uses as much as digits as its factorization.

28660717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 28660717 is about 5353.5704908033. The cubic root of 28660717 is about 306.0288359059.

The spelling of 28660717 in words is "twenty-eight million, six hundred sixty thousand, seven hundred seventeen".