28235121 has 16 divisors (see below), whose sum is σ = 39763200. Its totient is φ = 17772048.

The previous prime is 28235111. The next prime is 28235149. The reversal of 28235121 is 12153282.

It is not a de Polignac number, because 28235121 - 2⁷ = 28234993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28235091 and 28235100.

It is not an unprimeable number, because it can be changed into a prime (28235111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20950 + ... + 22256.

It is an arithmetic number, because the mean of its divisors is an integer number (2485200).

Almost surely, 2^28235121 is an apocalyptic number.

It is an amenable number.

28235121 is a deficient number, since it is larger than the sum of its proper divisors (11528079).

28235121 is a wasteful number, since it uses less digits than its factorization.

28235121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708.

The product of its digits is 960, while the sum is 24.

The square root of 28235121 is about 5313.6730234368. The cubic root of 28235121 is about 304.5064884659.

The spelling of 28235121 in words is "twenty-eight million, two hundred thirty-five thousand, one hundred twenty-one".