28005359 has 4 divisors (see below), whose sum is σ = 28533816. Its totient is φ = 27476904.

The previous prime is 28005349. The next prime is 28005371. The reversal of 28005359 is 95350082.

It is a happy number.

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-28005359 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 (28005349) 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, 264149 + ... + 264254.

It is an arithmetic number, because the mean of its divisors is an integer number (7133454).

Almost surely, 2^28005359 is an apocalyptic number.

28005359 is a deficient number, since it is larger than the sum of its proper divisors (528457).

28005359 is an equidigital number, since it uses as much as digits as its factorization.

28005359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528456.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 28005359 is about 5292.0089758049. The cubic root of 28005359 is about 303.6782686664.

The spelling of 28005359 in words is "twenty-eight million, five thousand, three hundred fifty-nine".