28455017 has 4 divisors (see below), whose sum is σ = 28536900. Its totient is φ = 28373136.

The previous prime is 28455013. The next prime is 28455019. The reversal of 28455017 is 71055482.

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 24049216 + 4405801 = 4904^2 + 2099^2 .

It is a cyclic number.

It is not a de Polignac number, because 28455017 - 2² = 28455013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28455013) 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, 40418 + ... + 41115.

It is an arithmetic number, because the mean of its divisors is an integer number (7134225).

Almost surely, 2^28455017 is an apocalyptic number.

It is an amenable number.

28455017 is a deficient number, since it is larger than the sum of its proper divisors (81883).

28455017 is an equidigital number, since it uses as much as digits as its factorization.

28455017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81882.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 28455017 is about 5334.3244183308. The cubic root of 28455017 is about 305.2949471468.

The spelling of 28455017 in words is "twenty-eight million, four hundred fifty-five thousand, seventeen".