28394041 has 4 divisors (see below), whose sum is σ = 30578212. Its totient is φ = 26209872.

The previous prime is 28394033. The next prime is 28394053. The reversal of 28394041 is 14049382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14049382 = 2 ⋅7024691.

It can be written as a sum of positive squares in 2 ways, for example, as 4968441 + 23425600 = 2229^2 + 4840^2 .

It is not a de Polignac number, because 28394041 - 2³ = 28394033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28393994 and 28394012.

It is not an unprimeable number, because it can be changed into a prime (28394141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1092066 + ... + 1092091.

It is an arithmetic number, because the mean of its divisors is an integer number (7644553).

Almost surely, 2^28394041 is an apocalyptic number.

It is an amenable number.

28394041 is a deficient number, since it is larger than the sum of its proper divisors (2184171).

28394041 is a wasteful number, since it uses less digits than its factorization.

28394041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184170.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28394041 is about 5328.6059152465. The cubic root of 28394041 is about 305.0767199280.

The spelling of 28394041 in words is "twenty-eight million, three hundred ninety-four thousand, forty-one".