28443371 has 8 divisors (see below), whose sum is σ = 31080000. Its totient is φ = 25815240.

The previous prime is 28443367. The next prime is 28443377. The reversal of 28443371 is 17334482.

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

It is not a de Polignac number, because 28443371 - 2² = 28443367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28443377) 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, 6380 + ... + 9878.

It is an arithmetic number, because the mean of its divisors is an integer number (3885000).

Almost surely, 2^28443371 is an apocalyptic number.

28443371 is a deficient number, since it is larger than the sum of its proper divisors (2636629).

28443371 is a wasteful number, since it uses less digits than its factorization.

28443371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249.

The product of its digits is 16128, while the sum is 32.

The square root of 28443371 is about 5333.2326969672. The cubic root of 28443371 is about 305.2532913394.

Subtracting from 28443371 its reverse (17334482), we obtain a square (11108889 = 3333²).

The spelling of 28443371 in words is "twenty-eight million, four hundred forty-three thousand, three hundred seventy-one".