28955611 has 4 divisors (see below), whose sum is σ = 29071224. Its totient is φ = 28840000.

The previous prime is 28955603. The next prime is 28955621. The reversal of 28955611 is 11655982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28955611 - 2³ = 28955603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28955621) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 57430 + ... + 57931.

It is an arithmetic number, because the mean of its divisors is an integer number (7267806).

Almost surely, 2^28955611 is an apocalyptic number.

28955611 is a deficient number, since it is larger than the sum of its proper divisors (115613).

28955611 is a wasteful number, since it uses less digits than its factorization.

28955611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115612.

The product of its digits is 21600, while the sum is 37.

The square root of 28955611 is about 5381.0418136268. The cubic root of 28955611 is about 307.0748472664.

The spelling of 28955611 in words is "twenty-eight million, nine hundred fifty-five thousand, six hundred eleven".