28508382 has 64 divisors (see below), whose sum is σ = 73820160. Its totient is φ = 7985952.

The previous prime is 28508377. The next prime is 28508383. The reversal of 28508382 is 28380582.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28508383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19323 + ... + 20745.

It is an arithmetic number, because the mean of its divisors is an integer number (1153440).

Almost surely, 2^28508382 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28508382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36910080).

28508382 is an abundant number, since it is smaller than the sum of its proper divisors (45311778).

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

28508382 is a wasteful number, since it uses less digits than its factorization.

28508382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494 (or 1488 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 28508382 is about 5339.3241145299. The cubic root of 28508382 is about 305.4856796593.

The spelling of 28508382 in words is "twenty-eight million, five hundred eight thousand, three hundred eighty-two".