404940 has 48 divisors (see below), whose sum is σ = 1203552. Its totient is φ = 101376.

The previous prime is 404851. The next prime is 404941. The reversal of 404940 is 49404.

It is a happy number.

404940 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404941) 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, 822 + ... + 1218.

It is an arithmetic number, because the mean of its divisors is an integer number (25074).

2⁴⁰⁴⁹⁴⁰ 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 404940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (601776).

404940 is an abundant number, since it is smaller than the sum of its proper divisors (798612).

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

404940 is a wasteful number, since it uses less digits than its factorization.

404940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 404940 is about 636.3489608697. The cubic root of 404940 is about 73.9827084020.

The spelling of 404940 in words is "four hundred four thousand, nine hundred forty".