28118234 has 8 divisors (see below), whose sum is σ = 42270228. Its totient is φ = 14028160.

The previous prime is 28118227. The next prime is 28118239. The reversal of 28118234 is 43281182.

It can be written as a sum of positive squares in 2 ways, for example, as 28058209 + 60025 = 5297^2 + 245^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28118197 and 28118206.

It is not an unprimeable number, because it can be changed into a prime (28118239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14327 + ... + 16170.

Almost surely, 2^28118234 is an apocalyptic number.

28118234 is a deficient number, since it is larger than the sum of its proper divisors (14151994).

28118234 is a wasteful number, since it uses less digits than its factorization.

28118234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30960.

The product of its digits is 3072, while the sum is 29.

The square root of 28118234 is about 5302.6629159320. The cubic root of 28118234 is about 304.0857113466.

The spelling of 28118234 in words is "twenty-eight million, one hundred eighteen thousand, two hundred thirty-four".