28043128 has 8 divisors (see below), whose sum is σ = 52580880. Its totient is φ = 14021560.

The previous prime is 28043117. The next prime is 28043129. The reversal of 28043128 is 82134082.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28043096 and 28043105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28043129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1752688 + ... + 1752703.

It is an arithmetic number, because the mean of its divisors is an integer number (6572610).

Almost surely, 2^28043128 is an apocalyptic number.

It is an amenable number.

28043128 is a deficient number, since it is larger than the sum of its proper divisors (24537752).

28043128 is a wasteful number, since it uses less digits than its factorization.

28043128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3505397 (or 3505393 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 28043128 is about 5295.5762670365. The cubic root of 28043128 is about 303.8147243626.

The spelling of 28043128 in words is "twenty-eight million, forty-three thousand, one hundred twenty-eight".