406443 has 8 divisors (see below), whose sum is σ = 551056. Its totient is φ = 266400.

The previous prime is 406423. The next prime is 406447. The reversal of 406443 is 344604.

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

It is not a de Polignac number, because 406443 - 2¹⁷ = 275371 is a prime.

It is a Duffinian number.

406443 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406447) 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, 928 + ... + 1293.

It is an arithmetic number, because the mean of its divisors is an integer number (68882).

2⁴⁰⁶⁴⁴³ is an apocalyptic number.

406443 is a deficient number, since it is larger than the sum of its proper divisors (144613).

406443 is a wasteful number, since it uses less digits than its factorization.

406443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 406443 is about 637.5288228778. The cubic root of 406443 is about 74.0741282993.

The spelling of 406443 in words is "four hundred six thousand, four hundred forty-three".