28552212 has 108 divisors (see below), whose sum is σ = 82516980. Its totient is φ = 8322912.

The previous prime is 28552189. The next prime is 28552217. The reversal of 28552212 is 21225582.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 1052676 + 27499536 = 1026^2 + 5244^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28552217) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1502739 + ... + 1502757.

Almost surely, 2^28552212 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 28552212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41258490).

28552212 is an abundant number, since it is smaller than the sum of its proper divisors (53964768).

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

28552212 is a wasteful number, since it uses less digits than its factorization.

28552212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 37 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 28552212 is about 5343.4269902376. The cubic root of 28552212 is about 305.6421550585.

Adding to 28552212 its reverse (21225582), we get a palindrome (49777794).

The spelling of 28552212 in words is "twenty-eight million, five hundred fifty-two thousand, two hundred twelve".