28719 has 6 divisors (see below), whose sum is σ = 41496. Its totient is φ = 19140.

The previous prime is 28711. The next prime is 28723. The reversal of 28719 is 91782.

It is not a de Polignac number, because 28719 - 2³ = 28711 is a prime.

It is a super-2 number, since 2×28719² = 1649561922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28692 and 28701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1587 + ... + 1604.

It is an arithmetic number, because the mean of its divisors is an integer number (6916).

2²⁸⁷¹⁹ is an apocalyptic number.

28719 is a deficient number, since it is larger than the sum of its proper divisors (12777).

28719 is a wasteful number, since it uses less digits than its factorization.

28719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3197 (or 3194 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 28719 is about 169.4668109100. The cubic root of 28719 is about 30.6236137093.

It can be divided in two parts, 28 and 719, that added together give a palindrome (747).

The spelling of 28719 in words is "twenty-eight thousand, seven hundred nineteen".