28071343 has 4 divisors (see below), whose sum is σ = 28333800. Its totient is φ = 27808888.

The previous prime is 28071319. The next prime is 28071349. The reversal of 28071343 is 34317082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28071343 - 2⁹ = 28070831 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 (28071349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131068 + ... + 131281.

It is an arithmetic number, because the mean of its divisors is an integer number (7083450).

Almost surely, 2^28071343 is an apocalyptic number.

28071343 is a deficient number, since it is larger than the sum of its proper divisors (262457).

28071343 is a wasteful number, since it uses less digits than its factorization.

28071343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262456.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 28071343 is about 5298.2396133055. The cubic root of 28071343 is about 303.9165824621.

The spelling of 28071343 in words is "twenty-eight million, seventy-one thousand, three hundred forty-three".