28020009424 has 80 divisors (see below), whose sum is σ = 62308886976. Its totient is φ = 12089779200.

The previous prime is 28020009373. The next prime is 28020009431. The reversal of 28020009424 is 42490002082.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214519 + ... + 319465.

Almost surely, 2^28020009424 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 28020009424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31154443488).

28020009424 is an abundant number, since it is smaller than the sum of its proper divisors (34288877552).

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

28020009424 is a wasteful number, since it uses less digits than its factorization.

28020009424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105044 (or 105038 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 28020009424 in words is "twenty-eight billion, twenty million, nine thousand, four hundred twenty-four".