28330999 has 8 divisors (see below), whose sum is σ = 29482560. Its totient is φ = 27191136.

The previous prime is 28330997. The next prime is 28331003. The reversal of 28330999 is 99903382.

It is a happy number.

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 28330999 - 2¹ = 28330997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28330997) 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, 2194 + ... + 7840.

It is an arithmetic number, because the mean of its divisors is an integer number (3685320).

Almost surely, 2^28330999 is an apocalyptic number.

28330999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28330999 is a deficient number, since it is larger than the sum of its proper divisors (1151561).

28330999 is a wasteful number, since it uses less digits than its factorization.

28330999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5849.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 28330999 is about 5322.6871972717. The cubic root of 28330999 is about 304.8507699602.

The spelling of 28330999 in words is "twenty-eight million, three hundred thirty thousand, nine hundred ninety-nine".