28718128 has 20 divisors (see below), whose sum is σ = 56826720. Its totient is φ = 14053184.

The previous prime is 28718119. The next prime is 28718147. The reversal of 28718128 is 82181782.

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 3 ways as a sum of consecutive naturals, for example, 18343 + ... + 19846.

It is an arithmetic number, because the mean of its divisors is an integer number (2841336).

Almost surely, 2^28718128 is an apocalyptic number.

It is an amenable number.

28718128 is a deficient number, since it is larger than the sum of its proper divisors (28108592).

28718128 is a wasteful number, since it uses less digits than its factorization.

28718128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38244 (or 38238 counting only the distinct ones).

The product of its digits is 14336, while the sum is 37.

The square root of 28718128 is about 5358.9297438948. The cubic root of 28718128 is about 306.2330376278.

The spelling of 28718128 in words is "twenty-eight million, seven hundred eighteen thousand, one hundred twenty-eight".