28933212 has 96 divisors (see below), whose sum is σ = 85123584. Its totient is φ = 7430400.

The previous prime is 28933189. The next prime is 28933217. The reversal of 28933212 is 21233982.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28933212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28933217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159762 + ... + 159942.

It is an arithmetic number, because the mean of its divisors is an integer number (886704).

Almost surely, 2^28933212 is an apocalyptic number.

28933212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28933212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42561792).

28933212 is an abundant number, since it is smaller than the sum of its proper divisors (56190372).

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

28933212 is a wasteful number, since it uses less digits than its factorization.

28933212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 377 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 28933212 is about 5378.9601225516. The cubic root of 28933212 is about 306.9956462227.

It can be divided in two parts, 2893 and 3212, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 28933212 in words is "twenty-eight million, nine hundred thirty-three thousand, two hundred twelve".