405405305 has 8 divisors (see below), whose sum is σ = 487890432. Its totient is φ = 323388208.

The previous prime is 405405293. The next prime is 405405311. The reversal of 405405305 is 503504504.

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

It is a cyclic number.

It is not a de Polignac number, because 405405305 - 2¹⁶ = 405339769 is a prime.

It is a super-2 number, since 2×405405305² = 328706922644286050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115097 + ... + 118566.

It is an arithmetic number, because the mean of its divisors is an integer number (60986304).

Almost surely, 2^405405305 is an apocalyptic number.

It is an amenable number.

405405305 is a deficient number, since it is larger than the sum of its proper divisors (82485127).

405405305 is a wasteful number, since it uses less digits than its factorization.

405405305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234015.

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 405405305 is about 20134.6791630758. The cubic root of 405405305 is about 740.1103469485.

Adding to 405405305 its reverse (503504504), we get a palindrome (908909809).

The spelling of 405405305 in words is "four hundred five million, four hundred five thousand, three hundred five".