345320505 has 48 divisors (see below), whose sum is σ = 626745600. Its totient is φ = 175553664.

The previous prime is 345320489. The next prime is 345320533. The reversal of 345320505 is 505023543.

345320505 is a `hidden beast` number, since 3 + 453 + 205 + 0 + 5 = 666.

It is not a de Polignac number, because 345320505 - 2⁴ = 345320489 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 576196 + ... + 576794.

It is an arithmetic number, because the mean of its divisors is an integer number (13057200).

Almost surely, 2^345320505 is an apocalyptic number.

It is an amenable number.

345320505 is a deficient number, since it is larger than the sum of its proper divisors (281425095).

345320505 is a wasteful number, since it uses less digits than its factorization.

345320505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190 (or 1187 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The square root of 345320505 is about 18582.8013227285. The cubic root of 345320505 is about 701.5750282946.

The spelling of 345320505 in words is "three hundred forty-five million, three hundred twenty thousand, five hundred five".