28280252 has 72 divisors (see below), whose sum is σ = 67702320. Its totient is φ = 10160640.

The previous prime is 28280251. The next prime is 28280267. The reversal of 28280252 is 25208282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28280251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27524 + ... + 28532.

It is an arithmetic number, because the mean of its divisors is an integer number (940310).

Almost surely, 2^28280252 is an apocalyptic number.

28280252 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 28280252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33851160).

28280252 is an abundant number, since it is smaller than the sum of its proper divisors (39422068).

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

28280252 is a wasteful number, since it uses less digits than its factorization.

28280252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 28280252 is about 5317.9180136591. The cubic root of 28280252 is about 304.6686430951.

The spelling of 28280252 in words is "twenty-eight million, two hundred eighty thousand, two hundred fifty-two".