28382172 has 144 divisors (see below), whose sum is σ = 85800960. Its totient is φ = 7233408.

The previous prime is 28382149. The next prime is 28382177. The reversal of 28382172 is 27128382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28382177) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 359229 + ... + 359307.

It is an arithmetic number, because the mean of its divisors is an integer number (595840).

Almost surely, 2^28382172 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 28382172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42900480).

28382172 is an abundant number, since it is smaller than the sum of its proper divisors (57418788).

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

28382172 is a wasteful number, since it uses less digits than its factorization.

28382172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 151 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 28382172 is about 5327.4920929083. The cubic root of 28382172 is about 305.0342056056.

The spelling of 28382172 in words is "twenty-eight million, three hundred eighty-two thousand, one hundred seventy-two".