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28751 is a prime number
BaseRepresentation
bin111000001001111
31110102212
413001033
51410001
6341035
7146552
oct70117
943385
1028751
111a668
121477b
1310118
14a699
1587bb
hex704f

28751 has 2 divisors, whose sum is σ = 28752. Its totient is φ = 28750.

The previous prime is 28729. The next prime is 28753. The reversal of 28751 is 15782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28751 - 26 = 28687 is a prime.

It is a Sophie Germain prime.

Together with 28753, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28751.

It is not a weakly prime, because it can be changed into another prime (28753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14375 + 14376.

It is an arithmetic number, because the mean of its divisors is an integer number (14376).

228751 is an apocalyptic number.

28751 is a deficient number, since it is larger than the sum of its proper divisors (1).

28751 is an equidigital number, since it uses as much as digits as its factorization.

28751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560, while the sum is 23.

The square root of 28751 is about 169.5611983916. The cubic root of 28751 is about 30.6349835561.

The spelling of 28751 in words is "twenty-eight thousand, seven hundred fifty-one".