28812888 has 128 divisors (see below), whose sum is σ = 89241600. Its totient is φ = 8553600.

The previous prime is 28812877. The next prime is 28812907. The reversal of 28812888 is 88821882.

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 31 ways as a sum of consecutive naturals, for example, 86883 + ... + 87213.

It is an arithmetic number, because the mean of its divisors is an integer number (697200).

Almost surely, 2^28812888 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 28812888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44620800).

28812888 is an abundant number, since it is smaller than the sum of its proper divisors (60428712).

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

28812888 is a wasteful number, since it uses less digits than its factorization.

28812888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 380 counting only the distinct ones).

The product of its digits is 131072, while the sum is 45.

The square root of 28812888 is about 5367.7637801975. The cubic root of 28812888 is about 306.5694892682.

The spelling of 28812888 in words is "twenty-eight million, eight hundred twelve thousand, eight hundred eighty-eight".