28036417 has 24 divisors (see below), whose sum is σ = 32171256. Its totient is φ = 24321024.

The previous prime is 28036403. The next prime is 28036423. The reversal of 28036417 is 71463082.

It can be written as a sum of positive squares in 12 ways, for example, as 410881 + 27625536 = 641^2 + 5256^2 .

It is not a de Polignac number, because 28036417 - 2⁷ = 28036289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28036427) 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 23 ways as a sum of consecutive naturals, for example, 528963 + ... + 529015.

It is an arithmetic number, because the mean of its divisors is an integer number (1340469).

Almost surely, 2^28036417 is an apocalyptic number.

It is an amenable number.

28036417 is a deficient number, since it is larger than the sum of its proper divisors (4134839).

28036417 is a wasteful number, since it uses less digits than its factorization.

28036417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 28036417 is about 5294.9425870353. The cubic root of 28036417 is about 303.7904871320.

Adding to 28036417 its reverse (71463082), we get a palindrome (99499499).

The spelling of 28036417 in words is "twenty-eight million, thirty-six thousand, four hundred seventeen".