404845 has 16 divisors (see below), whose sum is σ = 570240. Its totient is φ = 270144.

The previous prime is 404843. The next prime is 404849. The reversal of 404845 is 548404.

It is not a de Polignac number, because 404845 - 2¹ = 404843 is a prime.

404845 is a lucky number.

It is a plaindrome in base 13.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404843) 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 15 ways as a sum of consecutive naturals, for example, 1371 + ... + 1639.

It is an arithmetic number, because the mean of its divisors is an integer number (35640).

2⁴⁰⁴⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

404845 is a deficient number, since it is larger than the sum of its proper divisors (165395).

404845 is a wasteful number, since it uses less digits than its factorization.

404845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 404845 is about 636.2743119127. The cubic root of 404845 is about 73.9769224361.

The spelling of 404845 in words is "four hundred four thousand, eight hundred forty-five".