28338528 has 48 divisors (see below), whose sum is σ = 74886336. Its totient is φ = 9383040.

The previous prime is 28338523. The next prime is 28338533. The reversal of 28338528 is 82583382.

It is an interprime number because it is at equal distance from previous prime (28338523) and next prime (28338533).

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28338523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14743 + ... + 16553.

It is an arithmetic number, because the mean of its divisors is an integer number (1560132).

Almost surely, 2^28338528 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 28338528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37443168).

28338528 is an abundant number, since it is smaller than the sum of its proper divisors (46547808).

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

28338528 is a wasteful number, since it uses less digits than its factorization.

28338528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987 (or 1979 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 28338528 is about 5323.3944058279. The cubic root of 28338528 is about 304.8777723985.

The spelling of 28338528 in words is "twenty-eight million, three hundred thirty-eight thousand, five hundred twenty-eight".