28118128 has 20 divisors (see below), whose sum is σ = 55808928. Its totient is φ = 13715840.

The previous prime is 28118117. The next prime is 28118131. The reversal of 28118128 is 82181182.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 28118128.

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, 20776 + ... + 22087.

Almost surely, 2^28118128 is an apocalyptic number.

It is an amenable number.

28118128 is a deficient number, since it is larger than the sum of its proper divisors (27690800).

28118128 is a wasteful number, since it uses less digits than its factorization.

28118128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42912 (or 42906 counting only the distinct ones).

The product of its digits is 2048, while the sum is 31.

The square root of 28118128 is about 5302.6529209444. The cubic root of 28118128 is about 304.0853292324.

The spelling of 28118128 in words is "twenty-eight million, one hundred eighteen thousand, one hundred twenty-eight".