28537212 has 48 divisors (see below), whose sum is σ = 74616192. Its totient is φ = 8412480.

The previous prime is 28537211. The next prime is 28537217. The reversal of 28537212 is 21273582.

It is a self number, because there is not a number n which added to its sum of digits gives 28537212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28537211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1963 + ... + 7805.

It is an arithmetic number, because the mean of its divisors is an integer number (1554504).

Almost surely, 2^28537212 is an apocalyptic number.

28537212 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 28537212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37308096).

28537212 is an abundant number, since it is smaller than the sum of its proper divisors (46078980).

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

28537212 is a wasteful number, since it uses less digits than its factorization.

28537212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5898 (or 5896 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 28537212 is about 5342.0232122296. The cubic root of 28537212 is about 305.5886223070.

The spelling of 28537212 in words is "twenty-eight million, five hundred thirty-seven thousand, two hundred twelve".