28556845 has 8 divisors (see below), whose sum is σ = 34830360. Its totient is φ = 22470720.

The previous prime is 28556831. The next prime is 28556873. The reversal of 28556845 is 54865582.

It can be written as a sum of positive squares in 4 ways, for example, as 19881 + 28536964 = 141^2 + 5342^2 .

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

It is not a de Polignac number, because 28556845 - 2²³ = 20168237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46510 + ... + 47119.

It is an arithmetic number, because the mean of its divisors is an integer number (4353795).

Almost surely, 2^28556845 is an apocalyptic number.

It is an amenable number.

28556845 is a deficient number, since it is larger than the sum of its proper divisors (6273515).

28556845 is an equidigital number, since it uses as much as digits as its factorization.

28556845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93695.

The product of its digits is 384000, while the sum is 43.

The square root of 28556845 is about 5343.8604959336. The cubic root of 28556845 is about 305.6586857511.

The spelling of 28556845 in words is "twenty-eight million, five hundred fifty-six thousand, eight hundred forty-five".