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28585769 is a prime number
BaseRepresentation
bin110110100001…
…0111100101001
31222210022022012
41231002330221
524304221034
62500405305
7464655302
oct155027451
958708265
1028585769
1115154a03
1296a6835
135bcb374
143b217a9
152799cce
hex1b42f29

28585769 has 2 divisors, whose sum is σ = 28585770. Its totient is φ = 28585768.

The previous prime is 28585741. The next prime is 28585771. The reversal of 28585769 is 96758582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24880144 + 3705625 = 4988^2 + 1925^2 .

It is a cyclic number.

It is not a de Polignac number, because 28585769 - 212 = 28581673 is a prime.

It is a super-2 number, since 2×285857692 = 1634292378642722, which contains 22 as substring.

Together with 28585771, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (28585169) 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, 14292884 + 14292885.

It is an arithmetic number, because the mean of its divisors is an integer number (14292885).

Almost surely, 228585769 is an apocalyptic number.

It is an amenable number.

28585769 is a deficient number, since it is larger than the sum of its proper divisors (1).

28585769 is an equidigital number, since it uses as much as digits as its factorization.

28585769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 50.

The square root of 28585769 is about 5346.5660942328. The cubic root of 28585769 is about 305.7618471083.

The spelling of 28585769 in words is "twenty-eight million, five hundred eighty-five thousand, seven hundred sixty-nine".