28438672 has 20 divisors (see below), whose sum is σ = 57496320. Its totient is φ = 13600928.

The previous prime is 28438667. The next prime is 28438679. The reversal of 28438672 is 27683482.

It is not an unprimeable number, because it can be changed into a prime (28438679) 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 3 ways as a sum of consecutive naturals, for example, 38272 + ... + 39007.

It is an arithmetic number, because the mean of its divisors is an integer number (2874816).

Almost surely, 2^28438672 is an apocalyptic number.

It is an amenable number.

28438672 is an abundant number, since it is smaller than the sum of its proper divisors (29057648).

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

28438672 is a wasteful number, since it uses less digits than its factorization.

28438672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77310 (or 77304 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 28438672 is about 5332.7921392081. The cubic root of 28438672 is about 305.2364805775.

The spelling of 28438672 in words is "twenty-eight million, four hundred thirty-eight thousand, six hundred seventy-two".