28030212 has 120 divisors (see below), whose sum is σ = 88792704. Its totient is φ = 7527168.

The previous prime is 28030207. The next prime is 28030213. The reversal of 28030212 is 21203082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (28030213) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 38193 + ... + 38919.

Almost surely, 2^28030212 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 28030212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44396352).

28030212 is an abundant number, since it is smaller than the sum of its proper divisors (60762492).

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

28030212 is a wasteful number, since it uses less digits than its factorization.

28030212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 28030212 is about 5294.3566181360. The cubic root of 28030212 is about 303.7680739131.

Adding to 28030212 its reverse (21203082), we get a palindrome (49233294).

The spelling of 28030212 in words is "twenty-eight million, thirty thousand, two hundred twelve".