406444 has 6 divisors (see below), whose sum is σ = 711284. Its totient is φ = 203220.

The previous prime is 406423. The next prime is 406447. The reversal of 406444 is 444604.

It is a happy number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (406447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50802 + ... + 50809.

2⁴⁰⁶⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

406444 is a deficient number, since it is larger than the sum of its proper divisors (304840).

406444 is a wasteful number, since it uses less digits than its factorization.

406444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101615 (or 101613 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 406444 is about 637.5296071556. The cubic root of 406444 is about 74.0741890492.

The spelling of 406444 in words is "four hundred six thousand, four hundred forty-four".