28004933 has 8 divisors (see below), whose sum is σ = 32348160. Its totient is φ = 23961280.

The previous prime is 28004909. The next prime is 28004939. The reversal of 28004933 is 33940082.

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 28004933 - 2¹⁰ = 28003909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28004896 and 28004905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28004939) 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, 74693 + ... + 75066.

It is an arithmetic number, because the mean of its divisors is an integer number (4043520).

Almost surely, 2^28004933 is an apocalyptic number.

It is an amenable number.

28004933 is a deficient number, since it is larger than the sum of its proper divisors (4343227).

28004933 is a wasteful number, since it uses less digits than its factorization.

28004933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149787.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 28004933 is about 5291.9687262870. The cubic root of 28004933 is about 303.6767288707.

It can be divided in two parts, 280049 and 33, that added together give a palindrome (280082).

The spelling of 28004933 in words is "twenty-eight million, four thousand, nine hundred thirty-three".