28877288 has 64 divisors (see below), whose sum is σ = 63504000. Its totient is φ = 12165120.

The previous prime is 28877273. The next prime is 28877293. The reversal of 28877288 is 88277882.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145013 + ... + 145211.

It is an arithmetic number, because the mean of its divisors is an integer number (992250).

Almost surely, 2^28877288 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 28877288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31752000).

28877288 is an abundant number, since it is smaller than the sum of its proper divisors (34626712).

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

28877288 is a wasteful number, since it uses less digits than its factorization.

28877288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 326 counting only the distinct ones).

The product of its digits is 802816, while the sum is 50.

The square root of 28877288 is about 5373.7592056213. The cubic root of 28877288 is about 306.7977249108.

The spelling of 28877288 in words is "twenty-eight million, eight hundred seventy-seven thousand, two hundred eighty-eight".