28878248 has 48 divisors (see below), whose sum is σ = 65746080. Its totient is φ = 11834592.

The previous prime is 28878217. The next prime is 28878251. The reversal of 28878248 is 84287882.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7415 + ... + 10617.

It is an arithmetic number, because the mean of its divisors is an integer number (1369710).

Almost surely, 2^28878248 is an apocalyptic number.

28878248 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 28878248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32873040).

28878248 is an abundant number, since it is smaller than the sum of its proper divisors (36867832).

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

28878248 is a wasteful number, since it uses less digits than its factorization.

28878248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3246 (or 3235 counting only the distinct ones).

The product of its digits is 458752, while the sum is 47.

The square root of 28878248 is about 5373.8485278244. The cubic root of 28878248 is about 306.8011246132.

The spelling of 28878248 in words is "twenty-eight million, eight hundred seventy-eight thousand, two hundred forty-eight".