28858812 has 24 divisors (see below), whose sum is σ = 67428816. Its totient is φ = 9606528.

The previous prime is 28858807. The next prime is 28858867. The reversal of 28858812 is 21885882.

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, 12328 + ... + 14480.

It is an arithmetic number, because the mean of its divisors is an integer number (2809534).

Almost surely, 2^28858812 is an apocalyptic number.

It is an amenable number.

28858812 is an abundant number, since it is smaller than the sum of its proper divisors (38570004).

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

28858812 is a wasteful number, since it uses less digits than its factorization.

28858812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3277 (or 3275 counting only the distinct ones).

The product of its digits is 81920, while the sum is 42.

The square root of 28858812 is about 5372.0398360399. The cubic root of 28858812 is about 306.7322801214.

The spelling of 28858812 in words is "twenty-eight million, eight hundred fifty-eight thousand, eight hundred twelve".