28719528 has 64 divisors (see below), whose sum is σ = 77837760. Its totient is φ = 8795136.

The previous prime is 28719527. The next prime is 28719529. The reversal of 28719528 is 82591782.

It is an interprime number because it is at equal distance from previous prime (28719527) and next prime (28719529).

It is a super-2 number, since 2×28719528² = 1649622577085568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28719528.

It is not an unprimeable number, because it can be changed into a prime (28719527) 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 15 ways as a sum of consecutive naturals, for example, 16726 + ... + 18362.

It is an arithmetic number, because the mean of its divisors is an integer number (1216215).

Almost surely, 2^28719528 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 28719528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38918880).

28719528 is an abundant number, since it is smaller than the sum of its proper divisors (49118232).

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

28719528 is a wasteful number, since it uses less digits than its factorization.

28719528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706 (or 1702 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 28719528 is about 5359.0603653999. The cubic root of 28719528 is about 306.2380138027.

The spelling of 28719528 in words is "twenty-eight million, seven hundred nineteen thousand, five hundred twenty-eight".