28406041 has 4 divisors (see below), whose sum is σ = 28725300. Its totient is φ = 28086784.

The previous prime is 28406029. The next prime is 28406069. The reversal of 28406041 is 14060482.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7209225 + 21196816 = 2685^2 + 4604^2 .

It is a cyclic number.

It is not a de Polignac number, because 28406041 - 2⁷ = 28405913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28405997 and 28406015.

It is not an unprimeable number, because it can be changed into a prime (28406011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159496 + ... + 159673.

It is an arithmetic number, because the mean of its divisors is an integer number (7181325).

Almost surely, 2^28406041 is an apocalyptic number.

It is an amenable number.

28406041 is a deficient number, since it is larger than the sum of its proper divisors (319259).

28406041 is an equidigital number, since it uses as much as digits as its factorization.

28406041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319258.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 28406041 is about 5329.7317943776. The cubic root of 28406041 is about 305.1196914448.

The spelling of 28406041 in words is "twenty-eight million, four hundred six thousand, forty-one".