404445 has 16 divisors (see below), whose sum is σ = 659520.
Its totient is φ = 211584.
The previous prime is 404431. The next prime is 404449. The reversal of 404445 is 544404.
It is not a de Polignac number, because 404445 - 24 = 404429 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (404449) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 657 + ... + 1113.
It is an arithmetic number, because the mean of its divisors is an integer number (41220).
2404445 is an apocalyptic number.
It is an amenable number.
404445 is a deficient number, since it is larger than the sum of its proper divisors (255075).
404445 is a wasteful number, since it uses less digits than its factorization.
404445 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 524.
The product of its (nonzero) digits is 1280, while the sum is 21.
The square root of 404445 is about 635.9599043965.
The cubic root of 404445 is about 73.9525505408.
Adding to 404445 its reverse (544404), we get a palindrome (948849).
The spelling of 404445 in words is "four hundred four thousand, four hundred forty-five".