28804838 has 4 divisors (see below), whose sum is σ = 43207260. Its totient is φ = 14402418.

The previous prime is 28804813. The next prime is 28804873. The reversal of 28804838 is 83840882.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28804795 and 28804804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7201208 + ... + 7201211.

It is an arithmetic number, because the mean of its divisors is an integer number (10801815).

Almost surely, 2^28804838 is an apocalyptic number.

28804838 is a deficient number, since it is larger than the sum of its proper divisors (14402422).

28804838 is a wasteful number, since it uses less digits than its factorization.

28804838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14402421.

The product of its (nonzero) digits is 98304, while the sum is 41.

The square root of 28804838 is about 5367.0138811074. The cubic root of 28804838 is about 306.5409359086.

The spelling of 28804838 in words is "twenty-eight million, eight hundred four thousand, eight hundred thirty-eight".