28128043 has 8 divisors (see below), whose sum is σ = 28804608. Its totient is φ = 27454824.

The previous prime is 28128019. The next prime is 28128059. The reversal of 28128043 is 34082182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28128043 - 2⁹ = 28127531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28128083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25930 + ... + 26992.

It is an arithmetic number, because the mean of its divisors is an integer number (3600576).

Almost surely, 2^28128043 is an apocalyptic number.

28128043 is a deficient number, since it is larger than the sum of its proper divisors (676565).

28128043 is a wasteful number, since it uses less digits than its factorization.

28128043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673.

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

The square root of 28128043 is about 5303.5877479306. The cubic root of 28128043 is about 304.1210671702.

The spelling of 28128043 in words is "twenty-eight million, one hundred twenty-eight thousand, forty-three".