406144 has 32 divisors (see below), whose sum is σ = 856800. Its totient is φ = 191232.

The previous prime is 406123. The next prime is 406169. The reversal of 406144 is 441604.

406144 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

406144 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2349 + ... + 2515.

It is an arithmetic number, because the mean of its divisors is an integer number (26775).

2⁴⁰⁶¹⁴⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 406144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428400).

406144 is an abundant number, since it is smaller than the sum of its proper divisors (450656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

406144 is a wasteful number, since it uses less digits than its factorization.

406144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 406144 is about 637.2942805329. The cubic root of 406144 is about 74.0559596199.

Adding to 406144 its reverse (441604), we get a palindrome (847748).

The spelling of 406144 in words is "four hundred six thousand, one hundred forty-four".