6728423 has 4 divisors (see below), whose sum is σ = 7246008. Its totient is φ = 6210840.

The previous prime is 6728401. The next prime is 6728437. The reversal of 6728423 is 3248276.

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 6728423 - 2¹⁸ = 6466279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6728423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6728123) 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, 258773 + ... + 258798.

It is an arithmetic number, because the mean of its divisors is an integer number (1811502).

Almost surely, 2^6728423 is an apocalyptic number.

6728423 is a deficient number, since it is larger than the sum of its proper divisors (517585).

6728423 is a wasteful number, since it uses less digits than its factorization.

6728423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517584.

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

The square root of 6728423 is about 2593.9203919936. The cubic root of 6728423 is about 188.7865698188.

The spelling of 6728423 in words is "six million, seven hundred twenty-eight thousand, four hundred twenty-three".