28328333 has 8 divisors (see below), whose sum is σ = 30969216. Its totient is φ = 25698400.

The previous prime is 28328329. The next prime is 28328369. The reversal of 28328333 is 33382382.

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 28328333 - 2² = 28328329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28328333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28328323) 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, 3260 + ... + 8202.

It is an arithmetic number, because the mean of its divisors is an integer number (3871152).

Almost surely, 2^28328333 is an apocalyptic number.

It is an amenable number.

28328333 is a deficient number, since it is larger than the sum of its proper divisors (2640883).

28328333 is a wasteful number, since it uses less digits than its factorization.

28328333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5475.

The product of its digits is 20736, while the sum is 32.

The square root of 28328333 is about 5322.4367539690. The cubic root of 28328333 is about 304.8412073176.

The spelling of 28328333 in words is "twenty-eight million, three hundred twenty-eight thousand, three hundred thirty-three".