28368547 has 4 divisors (see below), whose sum is σ = 28768176. Its totient is φ = 27968920.

The previous prime is 28368541. The next prime is 28368559. The reversal of 28368547 is 74586382.

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 28368547 - 2⁷ = 28368419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28368541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199708 + ... + 199849.

It is an arithmetic number, because the mean of its divisors is an integer number (7192044).

Almost surely, 2^28368547 is an apocalyptic number.

28368547 is a deficient number, since it is larger than the sum of its proper divisors (399629).

28368547 is an equidigital number, since it uses as much as digits as its factorization.

28368547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399628.

The product of its digits is 322560, while the sum is 43.

The square root of 28368547 is about 5326.2131951322. The cubic root of 28368547 is about 304.9853867405.

The spelling of 28368547 in words is "twenty-eight million, three hundred sixty-eight thousand, five hundred forty-seven".