28228955 has 8 divisors (see below), whose sum is σ = 33947232. Its totient is φ = 22534848.

The previous prime is 28228933. The next prime is 28228969. The reversal of 28228955 is 55982282.

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 28228955 - 2²⁰ = 27180379 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3362 + ... + 8231.

It is an arithmetic number, because the mean of its divisors is an integer number (4243404).

Almost surely, 2^28228955 is an apocalyptic number.

28228955 is a deficient number, since it is larger than the sum of its proper divisors (5718277).

28228955 is a wasteful number, since it uses less digits than its factorization.

28228955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12085.

The product of its digits is 115200, while the sum is 41.

The square root of 28228955 is about 5313.0927904564. The cubic root of 28228955 is about 304.4843207585.

The spelling of 28228955 in words is "twenty-eight million, two hundred twenty-eight thousand, nine hundred fifty-five".