28443117 has 8 divisors (see below), whose sum is σ = 38260224. Its totient is φ = 18794048.

The previous prime is 28443073. The next prime is 28443119. The reversal of 28443117 is 71134482.

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 28443117 - 2⁸ = 28442861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28443119) 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, 41613 + ... + 42290.

It is an arithmetic number, because the mean of its divisors is an integer number (4782528).

Almost surely, 2^28443117 is an apocalyptic number.

It is an amenable number.

28443117 is a deficient number, since it is larger than the sum of its proper divisors (9817107).

28443117 is a wasteful number, since it uses less digits than its factorization.

28443117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84019.

The product of its digits is 5376, while the sum is 30.

The square root of 28443117 is about 5333.2088839647. The cubic root of 28443117 is about 305.2523826969.

Adding to 28443117 its reverse (71134482), we get a palindrome (99577599).

The spelling of 28443117 in words is "twenty-eight million, four hundred forty-three thousand, one hundred seventeen".