28245706 has 8 divisors (see below), whose sum is σ = 42743844. Its totient is φ = 13997760.

The previous prime is 28245703. The next prime is 28245727. The reversal of 28245706 is 60754282.

It can be written as a sum of positive squares in 2 ways, for example, as 17715681 + 10530025 = 4209^2 + 3245^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28245703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62265 + ... + 62716.

Almost surely, 2^28245706 is an apocalyptic number.

28245706 is a deficient number, since it is larger than the sum of its proper divisors (14498138).

28245706 is a wasteful number, since it uses less digits than its factorization.

28245706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125096.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 28245706 is about 5314.6689454753. The cubic root of 28245706 is about 304.5445356257.

Adding to 28245706 its reverse (60754282), we get a palindrome (88999988).

The spelling of 28245706 in words is "twenty-eight million, two hundred forty-five thousand, seven hundred six".