28998928 has 20 divisors (see below), whose sum is σ = 64212160. Its totient is φ = 12428064.

The previous prime is 28998917. The next prime is 28998961. The reversal of 28998928 is 82989982.

It is a super-3 number, since 3×28998928³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129348 + ... + 129571.

It is an arithmetic number, because the mean of its divisors is an integer number (3210608).

Almost surely, 2^28998928 is an apocalyptic number.

28998928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28998928 is an abundant number, since it is smaller than the sum of its proper divisors (35213232).

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

28998928 is a wasteful number, since it uses less digits than its factorization.

28998928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258934 (or 258928 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 55.

The square root of 28998928 is about 5385.0652735134. The cubic root of 28998928 is about 307.2278968626.

The spelling of 28998928 in words is "twenty-eight million, nine hundred ninety-eight thousand, nine hundred twenty-eight".