404004340 has 24 divisors (see below), whose sum is σ = 849301992. Its totient is φ = 161431680.

The previous prime is 404004317. The next prime is 404004373. The reversal of 404004340 is 43400404.

It can be written as a sum of positive squares in 4 ways, for example, as 13704804 + 390299536 = 3702^2 + 19756^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9810 + ... + 30070.

It is an arithmetic number, because the mean of its divisors is an integer number (35387583).

Almost surely, 2^404004340 is an apocalyptic number.

It is an amenable number.

404004340 is an abundant number, since it is smaller than the sum of its proper divisors (445297652).

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

404004340 is a wasteful number, since it uses less digits than its factorization.

404004340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21267 (or 21265 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 404004340 is about 20099.8592034870. The cubic root of 404004340 is about 739.2568263262.

Adding to 404004340 its reverse (43400404), we get a palindrome (447404744).

The spelling of 404004340 in words is "four hundred four million, four thousand, three hundred forty".