28634005 has 8 divisors (see below), whose sum is σ = 34701624. Its totient is φ = 22680000.

The previous prime is 28634003. The next prime is 28634009. The reversal of 28634005 is 50043682.

It can be written as a sum of positive squares in 4 ways, for example, as 11519236 + 17114769 = 3394^2 + 4137^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28634005 - 2¹ = 28634003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28634003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27846 + ... + 28855.

It is an arithmetic number, because the mean of its divisors is an integer number (4337703).

Almost surely, 2^28634005 is an apocalyptic number.

It is an amenable number.

28634005 is a deficient number, since it is larger than the sum of its proper divisors (6067619).

28634005 is a wasteful number, since it uses less digits than its factorization.

28634005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56807.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 28634005 is about 5351.0751256173. The cubic root of 28634005 is about 305.9337326421.

Adding to 28634005 its reverse (50043682), we get a palindrome (78677687).

The spelling of 28634005 in words is "twenty-eight million, six hundred thirty-four thousand, five".