28820041 has 4 divisors (see below), whose sum is σ = 28832272. Its totient is φ = 28807812.

The previous prime is 28820039. The next prime is 28820063. The reversal of 28820041 is 14002882.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28820041 - 2¹ = 28820039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28819988 and 28820015.

It is not an unprimeable number, because it can be changed into a prime (28820741) 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, 1335 + ... + 7708.

It is an arithmetic number, because the mean of its divisors is an integer number (7208068).

Almost surely, 2^28820041 is an apocalyptic number.

It is an amenable number.

28820041 is a deficient number, since it is larger than the sum of its proper divisors (12231).

28820041 is an equidigital number, since it uses as much as digits as its factorization.

28820041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12230.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 28820041 is about 5368.4300312102. The cubic root of 28820041 is about 306.5948565057.

The spelling of 28820041 in words is "twenty-eight million, eight hundred twenty thousand, forty-one".