28863212 has 24 divisors (see below), whose sum is σ = 61123104. Its totient is φ = 11642112.

The previous prime is 28863199. The next prime is 28863239. The reversal of 28863212 is 21236882.

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, 29843 + ... + 30794.

It is an arithmetic number, because the mean of its divisors is an integer number (2546796).

Almost surely, 2^28863212 is an apocalyptic number.

It is an amenable number.

28863212 is an abundant number, since it is smaller than the sum of its proper divisors (32259892).

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

28863212 is a wasteful number, since it uses less digits than its factorization.

28863212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60665 (or 60663 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 28863212 is about 5372.4493482954. The cubic root of 28863212 is about 306.7478681210.

The spelling of 28863212 in words is "twenty-eight million, eight hundred sixty-three thousand, two hundred twelve".