28204233 has 16 divisors (see below), whose sum is σ = 39515136. Its totient is φ = 17859600.

The previous prime is 28204229. The next prime is 28204247. The reversal of 28204233 is 33240282.

It is not a de Polignac number, because 28204233 - 2² = 28204229 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28204223) 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, 9066 + ... + 11772.

It is an arithmetic number, because the mean of its divisors is an integer number (2469696).

Almost surely, 2^28204233 is an apocalyptic number.

28204233 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28204233 is a deficient number, since it is larger than the sum of its proper divisors (11310903).

28204233 is a wasteful number, since it uses less digits than its factorization.

28204233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 28204233 is about 5310.7657639930. The cubic root of 28204233 is about 304.3954089788.

The spelling of 28204233 in words is "twenty-eight million, two hundred four thousand, two hundred thirty-three".