405340345 has 16 divisors (see below), whose sum is σ = 505497600. Its totient is φ = 311688000.

The previous prime is 405340297. The next prime is 405340381. The reversal of 405340345 is 543043504.

It is not a de Polignac number, because 405340345 - 2¹⁵ = 405307577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14320 + ... + 31870.

It is an arithmetic number, because the mean of its divisors is an integer number (31593600).

Almost surely, 2^405340345 is an apocalyptic number.

It is an amenable number.

405340345 is a deficient number, since it is larger than the sum of its proper divisors (100157255).

405340345 is a wasteful number, since it uses less digits than its factorization.

405340345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17736.

The product of its (nonzero) digits is 14400, while the sum is 28.

The square root of 405340345 is about 20133.0659612489. The cubic root of 405340345 is about 740.0708143822.

Adding to 405340345 its reverse (543043504), we get a palindrome (948383849).

The spelling of 405340345 in words is "four hundred five million, three hundred forty thousand, three hundred forty-five".