28643343 has 8 divisors (see below), whose sum is σ = 38817456. Its totient is φ = 18782400.

The previous prime is 28643311. The next prime is 28643357. The reversal of 28643343 is 34334682.

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

It is not a de Polignac number, because 28643343 - 2⁵ = 28643311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28643443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78078 + ... + 78443.

It is an arithmetic number, because the mean of its divisors is an integer number (4852182).

Almost surely, 2^28643343 is an apocalyptic number.

28643343 is a deficient number, since it is larger than the sum of its proper divisors (10174113).

28643343 is a wasteful number, since it uses less digits than its factorization.

28643343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156585.

The product of its digits is 41472, while the sum is 33.

The square root of 28643343 is about 5351.9475894295. The cubic root of 28643343 is about 305.9669856304.

The spelling of 28643343 in words is "twenty-eight million, six hundred forty-three thousand, three hundred forty-three".