28365607 has 4 divisors (see below), whose sum is σ = 28846440. Its totient is φ = 27884776.

The previous prime is 28365587. The next prime is 28365611. The reversal of 28365607 is 70656382.

28365607 is nontrivially palindromic in base 7.

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-28365607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28365677) 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, 240328 + ... + 240445.

It is an arithmetic number, because the mean of its divisors is an integer number (7211610).

Almost surely, 2^28365607 is an apocalyptic number.

28365607 is a deficient number, since it is larger than the sum of its proper divisors (480833).

28365607 is an equidigital number, since it uses as much as digits as its factorization.

28365607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480832.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 28365607 is about 5325.9371945227. The cubic root of 28365607 is about 304.9748505645.

The spelling of 28365607 in words is "twenty-eight million, three hundred sixty-five thousand, six hundred seven".