28653212 has 12 divisors (see below), whose sum is σ = 57306480. Its totient is φ = 12279936.

The previous prime is 28653169. The next prime is 28653217. The reversal of 28653212 is 21235682.

28653212 is an admirable number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28653217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511637 + ... + 511692.

It is an arithmetic number, because the mean of its divisors is an integer number (4775540).

Almost surely, 2^28653212 is an apocalyptic number.

It is an amenable number.

28653212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28653212 is a wasteful number, since it uses less digits than its factorization.

28653212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023340 (or 1023338 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 28653212 is about 5352.8695108325. The cubic root of 28653212 is about 306.0021216764.

Adding to 28653212 its reverse (21235682), we get a palindrome (49888894).

The spelling of 28653212 in words is "twenty-eight million, six hundred fifty-three thousand, two hundred twelve".