20028528 has 90 divisors (see below), whose sum is σ = 60769176. Its totient is φ = 6155136.

The previous prime is 20028523. The next prime is 20028529. The reversal of 20028528 is 82582002.

It is a super-2 number, since 2×20028528² = 802283867693568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20028521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23925 + ... + 24747.

Almost surely, 2^20028528 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 20028528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30384588).

20028528 is an abundant number, since it is smaller than the sum of its proper divisors (40740648).

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

20028528 is a wasteful number, since it uses less digits than its factorization.

20028528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 20028528 is about 4475.3243457877. The cubic root of 20028528 is about 271.5707618532.

The spelling of 20028528 in words is "twenty million, twenty-eight thousand, five hundred twenty-eight".