28722333 has 8 divisors (see below), whose sum is σ = 40549248. Its totient is φ = 18021824.

The previous prime is 28722329. The next prime is 28722349. The reversal of 28722333 is 33322782.

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 28722333 - 2² = 28722329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28722333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28722313) 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 7 ways as a sum of consecutive naturals, for example, 281541 + ... + 281642.

It is an arithmetic number, because the mean of its divisors is an integer number (5068656).

Almost surely, 2^28722333 is an apocalyptic number.

It is an amenable number.

28722333 is a deficient number, since it is larger than the sum of its proper divisors (11826915).

28722333 is a wasteful number, since it uses less digits than its factorization.

28722333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563203.

The product of its digits is 12096, while the sum is 30.

The square root of 28722333 is about 5359.3220653362. The cubic root of 28722333 is about 306.2479834381.

The spelling of 28722333 in words is "twenty-eight million, seven hundred twenty-two thousand, three hundred thirty-three".