28358047 has 4 divisors (see below), whose sum is σ = 28650496. Its totient is φ = 28065600.

The previous prime is 28358017. The next prime is 28358053. The reversal of 28358047 is 74085382.

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 28358047 - 2¹⁵ = 28325279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28357997 and 28358015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28358017) 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, 146079 + ... + 146272.

It is an arithmetic number, because the mean of its divisors is an integer number (7162624).

Almost surely, 2^28358047 is an apocalyptic number.

28358047 is a deficient number, since it is larger than the sum of its proper divisors (292449).

28358047 is an equidigital number, since it uses as much as digits as its factorization.

28358047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292448.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 28358047 is about 5325.2274129844. The cubic root of 28358047 is about 304.9477541970.

The spelling of 28358047 in words is "twenty-eight million, three hundred fifty-eight thousand, forty-seven".