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1028189 is a prime number
BaseRepresentation
bin11111011000001011101
31221020102002
43323001131
5230400224
634012045
711511431
oct3730135
91836362
101028189
11642548
12417025
1329ccc6
141ca9c1
151549ae
hexfb05d

1028189 has 2 divisors, whose sum is σ = 1028190. Its totient is φ = 1028188.

The previous prime is 1028149. The next prime is 1028191. The reversal of 1028189 is 9818201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 708964 + 319225 = 842^2 + 565^2 .

It is an emirp because it is prime and its reverse (9818201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1028189 - 216 = 962653 is a prime.

Together with 1028191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1028129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514094 + 514095.

It is an arithmetic number, because the mean of its divisors is an integer number (514095).

21028189 is an apocalyptic number.

It is an amenable number.

1028189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028189 is an equidigital number, since it uses as much as digits as its factorization.

1028189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1028189 is about 1013.9965483176. The cubic root of 1028189 is about 100.9309399482.

It can be divided in two parts, 102 and 8189, that multiplied together give a triangular number (835278 = T1292).

The spelling of 1028189 in words is "one million, twenty-eight thousand, one hundred eighty-nine".