28101528 has 96 divisors (see below), whose sum is σ = 93693600. Its totient is φ = 7409664.

The previous prime is 28101509. The next prime is 28101529. The reversal of 28101528 is 82510182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28101529) 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 23 ways as a sum of consecutive naturals, for example, 4408 + ... + 8696.

It is an arithmetic number, because the mean of its divisors is an integer number (975975).

Almost surely, 2^28101528 is an apocalyptic number.

28101528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28101528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46846800).

28101528 is an abundant number, since it is smaller than the sum of its proper divisors (65592072).

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

28101528 is a wasteful number, since it uses less digits than its factorization.

28101528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4321 (or 4314 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 28101528 is about 5301.0874356117. The cubic root of 28101528 is about 304.0254768584.

The spelling of 28101528 in words is "twenty-eight million, one hundred one thousand, five hundred twenty-eight".