28245547 has 8 divisors (see below), whose sum is σ = 30950640. Its totient is φ = 25563360.

The previous prime is 28245521. The next prime is 28245563. The reversal of 28245547 is 74554282.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28245547 - 2¹⁹ = 27721259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28245047) 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 7 ways as a sum of consecutive naturals, for example, 3088 + ... + 8125.

It is an arithmetic number, because the mean of its divisors is an integer number (3868830).

Almost surely, 2^28245547 is an apocalyptic number.

28245547 is a deficient number, since it is larger than the sum of its proper divisors (2705093).

28245547 is a wasteful number, since it uses less digits than its factorization.

28245547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11453.

The product of its digits is 89600, while the sum is 37.

The square root of 28245547 is about 5314.6539868556. The cubic root of 28245547 is about 304.5439641799.

The spelling of 28245547 in words is "twenty-eight million, two hundred forty-five thousand, five hundred forty-seven".