28998 has 20 divisors (see below), whose sum is σ = 65340. Its totient is φ = 9612.

The previous prime is 28979. The next prime is 29009. The reversal of 28998 is 89982.

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 28998.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 73 + ... + 251.

It is an arithmetic number, because the mean of its divisors is an integer number (3267).

2²⁸⁹⁹⁸ is an apocalyptic number.

28998 is the 108-th heptagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32670).

28998 is an abundant number, since it is smaller than the sum of its proper divisors (36342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28998 is a wasteful number, since it uses less digits than its factorization.

28998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 184 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 28998 is about 170.2879913558. The cubic root of 28998 is about 30.7224619609.

The spelling of 28998 in words is "twenty-eight thousand, nine hundred ninety-eight".