28543872 has 192 divisors, whose sum is σ = 92791440. Its totient is φ = 7741440.

The previous prime is 28543861. The next prime is 28543883. The reversal of 28543872 is 27834582.

It is an interprime number because it is at equal distance from previous prime (28543861) and next prime (28543883).

It is a tau number, because it is divible by the number of its divisors (192).

It is a self number, because there is not a number n which added to its sum of digits gives 28543872.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 696172 + ... + 696212.

Almost surely, 2^28543872 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 28543872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46395720).

28543872 is an abundant number, since it is smaller than the sum of its proper divisors (64247568).

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

28543872 is a wasteful number, since it uses less digits than its factorization.

28543872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 90 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The square root of 28543872 is about 5342.6465351921. The cubic root of 28543872 is about 305.6123931635.

The spelling of 28543872 in words is "twenty-eight million, five hundred forty-three thousand, eight hundred seventy-two".