28638333 has 32 divisors (see below), whose sum is σ = 44140800. Its totient is φ = 18335808.

The previous prime is 28638317. The next prime is 28638359. The reversal of 28638333 is 33383682.

It is not a de Polignac number, because 28638333 - 2⁴ = 28638317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28638383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108760 + ... + 109022.

It is an arithmetic number, because the mean of its divisors is an integer number (1379400).

Almost surely, 2^28638333 is an apocalyptic number.

It is an amenable number.

28638333 is a deficient number, since it is larger than the sum of its proper divisors (15502467).

28638333 is a wasteful number, since it uses less digits than its factorization.

28638333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 412 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 28638333 is about 5351.4795150500. The cubic root of 28638333 is about 305.9491457204.

The spelling of 28638333 in words is "twenty-eight million, six hundred thirty-eight thousand, three hundred thirty-three".