28351 has 2 divisors, whose sum is σ = 28352. Its totient is φ = 28350.

The previous prime is 28349. The next prime is 28387. The reversal of 28351 is 15382.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28351 - 2¹ = 28349 is a prime.

Together with 28349, it forms a pair of twin primes.

28351 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14175 + 14176.

It is an arithmetic number, because the mean of its divisors is an integer number (14176).

2²⁸³⁵¹ is an apocalyptic number.

28351 is a deficient number, since it is larger than the sum of its proper divisors (1).

28351 is an equidigital number, since it uses as much as digits as its factorization.

28351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 19.

The square root of 28351 is about 168.3775519480. The cubic root of 28351 is about 30.4922492175.

The spelling of 28351 in words is "twenty-eight thousand, three hundred fifty-one".