28168252 has 54 divisors (see below), whose sum is σ = 60876872. Its totient is φ = 11169408.

The previous prime is 28168249. The next prime is 28168267. The reversal of 28168252 is 25286182.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 477399 + ... + 477457.

Almost surely, 2^28168252 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 28168252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30438436).

28168252 is an abundant number, since it is smaller than the sum of its proper divisors (32708620).

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

28168252 is a wasteful number, since it uses less digits than its factorization.

28168252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 85 counting only the distinct ones).

The product of its digits is 15360, while the sum is 34.

The square root of 28168252 is about 5307.3771299956. The cubic root of 28168252 is about 304.2659117272.

The spelling of 28168252 in words is "twenty-eight million, one hundred sixty-eight thousand, two hundred fifty-two".