28858147 has 4 divisors (see below), whose sum is σ = 29223520. Its totient is φ = 28492776.

The previous prime is 28858133. The next prime is 28858157. The reversal of 28858147 is 74185882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28858147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28858157) 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 3 ways as a sum of consecutive naturals, for example, 182568 + ... + 182725.

It is an arithmetic number, because the mean of its divisors is an integer number (7305880).

Almost surely, 2^28858147 is an apocalyptic number.

28858147 is a deficient number, since it is larger than the sum of its proper divisors (365373).

28858147 is an equidigital number, since it uses as much as digits as its factorization.

28858147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365372.

The product of its digits is 143360, while the sum is 43.

The square root of 28858147 is about 5371.9779411312. The cubic root of 28858147 is about 306.7299240700.

The spelling of 28858147 in words is "twenty-eight million, eight hundred fifty-eight thousand, one hundred forty-seven".