28830905 has 8 divisors (see below), whose sum is σ = 34870272. Its totient is φ = 22882608.

The previous prime is 28830889. The next prime is 28830911. The reversal of 28830905 is 50903882.

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 28830905 - 2⁴ = 28830889 is a prime.

It is a Duffinian number.

It is a Curzon 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, 22067 + ... + 23336.

It is an arithmetic number, because the mean of its divisors is an integer number (4358784).

Almost surely, 2^28830905 is an apocalyptic number.

It is an amenable number.

28830905 is a deficient number, since it is larger than the sum of its proper divisors (6039367).

28830905 is a wasteful number, since it uses less digits than its factorization.

28830905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45535.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 28830905 is about 5369.4417773173. The cubic root of 28830905 is about 306.6333763222.

The spelling of 28830905 in words is "twenty-eight million, eight hundred thirty thousand, nine hundred five".