28152128 has 28 divisors (see below), whose sum is σ = 56400192. Its totient is φ = 13941120.

The previous prime is 28152121. The next prime is 28152133. The reversal of 28152128 is 82125182.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28152128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28152121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4793 + ... + 8903.

Almost surely, 2^28152128 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 28152128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28200096).

28152128 is an abundant number, since it is smaller than the sum of its proper divisors (28248064).

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

28152128 is a wasteful number, since it uses less digits than its factorization.

28152128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4230 (or 4220 counting only the distinct ones).

The product of its digits is 2560, while the sum is 29.

The square root of 28152128 is about 5305.8578948178. The cubic root of 28152128 is about 304.2078449369.

The spelling of 28152128 in words is "twenty-eight million, one hundred fifty-two thousand, one hundred twenty-eight".