28330855 has 8 divisors (see below), whose sum is σ = 38853792. Its totient is φ = 19426848.

The previous prime is 28330837. The next prime is 28330859. The reversal of 28330855 is 55803382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-28330855 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 28330855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28330859) 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, 404692 + ... + 404761.

It is an arithmetic number, because the mean of its divisors is an integer number (4856724).

Almost surely, 2^28330855 is an apocalyptic number.

28330855 is a deficient number, since it is larger than the sum of its proper divisors (10522937).

28330855 is an equidigital number, since it uses as much as digits as its factorization.

28330855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809465.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 28330855 is about 5322.6736702526. The cubic root of 28330855 is about 304.8502534637.

The spelling of 28330855 in words is "twenty-eight million, three hundred thirty thousand, eight hundred fifty-five".