28083143 has 8 divisors (see below), whose sum is σ = 30858240. Its totient is φ = 25345080.

The previous prime is 28083137. The next prime is 28083169. The reversal of 28083143 is 34138082.

It is a happy number.

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 28083143 - 2¹⁸ = 27820999 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 (28083103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7655 + ... + 10712.

It is an arithmetic number, because the mean of its divisors is an integer number (3857280).

Almost surely, 2^28083143 is an apocalyptic number.

28083143 is a deficient number, since it is larger than the sum of its proper divisors (2775097).

28083143 is a wasteful number, since it uses less digits than its factorization.

28083143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18517.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28083143 is about 5299.3530737251. The cubic root of 28083143 is about 303.9591610364.

The spelling of 28083143 in words is "twenty-eight million, eighty-three thousand, one hundred forty-three".