28141547 has 4 divisors (see below), whose sum is σ = 32161776. Its totient is φ = 24121320.

The previous prime is 28141537. The next prime is 28141559. The reversal of 28141547 is 74514182.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28141547 - 2⁶ = 28141483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28141537) 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, 2010104 + ... + 2010117.

It is an arithmetic number, because the mean of its divisors is an integer number (8040444).

Almost surely, 2^28141547 is an apocalyptic number.

28141547 is a deficient number, since it is larger than the sum of its proper divisors (4020229).

28141547 is an equidigital number, since it uses as much as digits as its factorization.

28141547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020228.

The product of its digits is 8960, while the sum is 32.

The square root of 28141547 is about 5304.8606956262. The cubic root of 28141547 is about 304.1697279065.

The spelling of 28141547 in words is "twenty-eight million, one hundred forty-one thousand, five hundred forty-seven".