28448191 has 8 divisors (see below), whose sum is σ = 30196800. Its totient is φ = 26707968.

The previous prime is 28448183. The next prime is 28448201. The reversal of 28448191 is 19184482.

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

It is a cyclic number.

It is not a de Polignac number, because 28448191 - 2³ = 28448183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28448191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28448141) 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, 5770 + ... + 9496.

It is an arithmetic number, because the mean of its divisors is an integer number (3774600).

Almost surely, 2^28448191 is an apocalyptic number.

28448191 is a deficient number, since it is larger than the sum of its proper divisors (1748609).

28448191 is a wasteful number, since it uses less digits than its factorization.

28448191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4193.

The product of its digits is 18432, while the sum is 37.

The square root of 28448191 is about 5333.6845613516. The cubic root of 28448191 is about 305.2705330576.

The spelling of 28448191 in words is "twenty-eight million, four hundred forty-eight thousand, one hundred ninety-one".