28605347 has 4 divisors (see below), whose sum is σ = 28967520. Its totient is φ = 28243176.

The previous prime is 28605301. The next prime is 28605349. The reversal of 28605347 is 74350682.

It is a happy number.

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 28605347 - 2⁸ = 28605091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28605349) 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, 180968 + ... + 181125.

It is an arithmetic number, because the mean of its divisors is an integer number (7241880).

Almost surely, 2^28605347 is an apocalyptic number.

28605347 is a deficient number, since it is larger than the sum of its proper divisors (362173).

28605347 is an equidigital number, since it uses as much as digits as its factorization.

28605347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362172.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 28605347 is about 5348.3966756403. The cubic root of 28605347 is about 305.8316352062.

The spelling of 28605347 in words is "twenty-eight million, six hundred five thousand, three hundred forty-seven".