28608191 has 8 divisors (see below), whose sum is σ = 29326080. Its totient is φ = 27899352.

The previous prime is 28608137. The next prime is 28608193. The reversal of 28608191 is 19180682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28608191 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 (28608193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4376 + ... + 8738.

It is an arithmetic number, because the mean of its divisors is an integer number (3665760).

Almost surely, 2^28608191 is an apocalyptic number.

28608191 is a deficient number, since it is larger than the sum of its proper divisors (717889).

28608191 is an equidigital number, since it uses as much as digits as its factorization.

28608191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 28608191 is about 5348.6625431036. The cubic root of 28608191 is about 305.8417703317.

The spelling of 28608191 in words is "twenty-eight million, six hundred eight thousand, one hundred ninety-one".