28988298 has 48 divisors (see below), whose sum is σ = 67636296. Its totient is φ = 8939520.

The previous prime is 28988291. The next prime is 28988299. The reversal of 28988298 is 89288982.

It can be written as a sum of positive squares in 4 ways, for example, as 14722569 + 14265729 = 3837^2 + 3777^2 .

It is not an unprimeable number, because it can be changed into a prime (28988291) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 17890 + ... + 19442.

Almost surely, 2^28988298 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28988298, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33818148).

28988298 is an abundant number, since it is smaller than the sum of its proper divisors (38647998).

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

28988298 is a wasteful number, since it uses less digits than its factorization.

28988298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639 (or 1636 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 54.

The square root of 28988298 is about 5384.0781940830. The cubic root of 28988298 is about 307.1903525820.

The spelling of 28988298 in words is "twenty-eight million, nine hundred eighty-eight thousand, two hundred ninety-eight".