28613 has 8 divisors (see below), whose sum is σ = 32256. Its totient is φ = 25200.

The previous prime is 28607. The next prime is 28619. The reversal of 28613 is 31682.

It is an interprime number because it is at equal distance from previous prime (28607) and next prime (28619).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28613 - 2⁴ = 28597 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368 + ... + 438.

It is an arithmetic number, because the mean of its divisors is an integer number (4032).

2²⁸⁶¹³ is an apocalyptic number.

It is an amenable number.

28613 is a deficient number, since it is larger than the sum of its proper divisors (3643).

28613 is a wasteful number, since it uses less digits than its factorization.

28613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115.

The product of its digits is 288, while the sum is 20.

The square root of 28613 is about 169.1537761920. The cubic root of 28613 is about 30.5858906574.

The spelling of 28613 in words is "twenty-eight thousand, six hundred thirteen".