28998684 has 144 divisors (see below), whose sum is σ = 88792704. Its totient is φ = 7862400.

The previous prime is 28998679. The next prime is 28998701. The reversal of 28998684 is 48689982.

It is a self number, because there is not a number n which added to its sum of digits gives 28998684.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221299 + ... + 221429.

It is an arithmetic number, because the mean of its divisors is an integer number (616616).

Almost surely, 2^28998684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28998684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44396352).

28998684 is an abundant number, since it is smaller than the sum of its proper divisors (59794020).

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

28998684 is a wasteful number, since it uses less digits than its factorization.

28998684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 203 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 28998684 is about 5385.0426182158. The cubic root of 28998684 is about 307.2270351777.

The spelling of 28998684 in words is "twenty-eight million, nine hundred ninety-eight thousand, six hundred eighty-four".