28555841 has 4 divisors (see below), whose sum is σ = 30058800. Its totient is φ = 27052884.

The previous prime is 28555829. The next prime is 28555843. The reversal of 28555841 is 14855582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28555841 - 2⁶ = 28555777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28555795 and 28555804.

It is not an unprimeable number, because it can be changed into a prime (28555843) 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 3 ways as a sum of consecutive naturals, for example, 751451 + ... + 751488.

It is an arithmetic number, because the mean of its divisors is an integer number (7514700).

Almost surely, 2^28555841 is an apocalyptic number.

It is an amenable number.

28555841 is a deficient number, since it is larger than the sum of its proper divisors (1502959).

28555841 is a wasteful number, since it uses less digits than its factorization.

28555841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502958.

The product of its digits is 64000, while the sum is 38.

The square root of 28555841 is about 5343.7665555299. The cubic root of 28555841 is about 305.6551035986.

The spelling of 28555841 in words is "twenty-eight million, five hundred fifty-five thousand, eight hundred forty-one".