28543968 has 48 divisors (see below), whose sum is σ = 83255760. Its totient is φ = 9514368.

The previous prime is 28543967. The next prime is 28543973. The reversal of 28543968 is 86934582.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28543967) 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 7 ways as a sum of consecutive naturals, for example, 15655 + ... + 17382.

It is an arithmetic number, because the mean of its divisors is an integer number (1734495).

Almost surely, 2^28543968 is an apocalyptic number.

It is an amenable number.

28543968 is an abundant number, since it is smaller than the sum of its proper divisors (54711792).

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

28543968 is a wasteful number, since it uses less digits than its factorization.

28543968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33056 (or 33042 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 28543968 is about 5342.6555194959. The cubic root of 28543968 is about 305.6127357795.

It can be divided in two parts, 285 and 43968, that added together give a triangular number (44253 = T₂₉₇).

The spelling of 28543968 in words is "twenty-eight million, five hundred forty-three thousand, nine hundred sixty-eight".