404340305 has 8 divisors (see below), whose sum is σ = 485904744. Its totient is φ = 323008000.

The previous prime is 404340289. The next prime is 404340331. The reversal of 404340305 is 503043404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 188485441 + 215854864 = 13729^2 + 14692^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 404340305 - 2⁴ = 404340289 is a prime.

It is a Duffinian 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, 54176 + ... + 61185.

It is an arithmetic number, because the mean of its divisors is an integer number (60738093).

Almost surely, 2^404340305 is an apocalyptic number.

It is an amenable number.

404340305 is a deficient number, since it is larger than the sum of its proper divisors (81564439).

404340305 is a wasteful number, since it uses less digits than its factorization.

404340305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116067.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 404340305 is about 20108.2148635825. The cubic root of 404340305 is about 739.4616884867.

Adding to 404340305 its reverse (503043404), we get a palindrome (907383709).

The spelling of 404340305 in words is "four hundred four million, three hundred forty thousand, three hundred five".