28384191 has 24 divisors (see below), whose sum is σ = 44899920. Its totient is φ = 17136000.

The previous prime is 28384183. The next prime is 28384199. The reversal of 28384191 is 19148382.

It is an interprime number because it is at equal distance from previous prime (28384183) and next prime (28384199).

It is not a de Polignac number, because 28384191 - 2³ = 28384183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28384199) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40141 + ... + 40841.

It is an arithmetic number, because the mean of its divisors is an integer number (1870830).

Almost surely, 2^28384191 is an apocalyptic number.

28384191 is a deficient number, since it is larger than the sum of its proper divisors (16515729).

28384191 is a wasteful number, since it uses less digits than its factorization.

28384191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127 (or 1124 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 28384191 is about 5327.6815783228. The cubic root of 28384191 is about 305.0414384260.

The spelling of 28384191 in words is "twenty-eight million, three hundred eighty-four thousand, one hundred ninety-one".