28998228 has 48 divisors (see below), whose sum is σ = 78404480. Its totient is φ = 8169984.

The previous prime is 28998227. The next prime is 28998257. The reversal of 28998228 is 82289982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28998227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3768 + ... + 8496.

Almost surely, 2^28998228 is an apocalyptic number.

28998228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28998228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39202240).

28998228 is an abundant number, since it is smaller than the sum of its proper divisors (49406252).

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

28998228 is a wasteful number, since it uses less digits than its factorization.

28998228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4816 (or 4814 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 28998228 is about 5385.0002785515. Note that the first 3 decimals coincide. The cubic root of 28998228 is about 307.2254248027.

The spelling of 28998228 in words is "twenty-eight million, nine hundred ninety-eight thousand, two hundred twenty-eight".