28828788 has 24 divisors (see below), whose sum is σ = 67963392. Its totient is φ = 9510144.

The previous prime is 28828741. The next prime is 28828799. The reversal of 28828788 is 88782882.

It is a self number, because there is not a number n which added to its sum of digits gives 28828788.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11220 + ... + 13547.

It is an arithmetic number, because the mean of its divisors is an integer number (2831808).

Almost surely, 2^28828788 is an apocalyptic number.

It is an amenable number.

28828788 is an abundant number, since it is smaller than the sum of its proper divisors (39134604).

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

28828788 is a wasteful number, since it uses less digits than its factorization.

28828788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24871 (or 24869 counting only the distinct ones).

The product of its digits is 917504, while the sum is 51.

The square root of 28828788 is about 5369.2446396118. The cubic root of 28828788 is about 306.6258709647.

The spelling of 28828788 in words is "twenty-eight million, eight hundred twenty-eight thousand, seven hundred eighty-eight".