350640505 has 8 divisors (see below), whose sum is σ = 427666824. Its totient is φ = 275913600.

The previous prime is 350640491. The next prime is 350640541. The reversal of 350640505 is 505046053.

It can be written as a sum of positive squares in 4 ways, for example, as 25775929 + 324864576 = 5077^2 + 18024^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-350640505 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, 574516 + ... + 575125.

It is an arithmetic number, because the mean of its divisors is an integer number (53458353).

Almost surely, 2^350640505 is an apocalyptic number.

It is an amenable number.

350640505 is a deficient number, since it is larger than the sum of its proper divisors (77026319).

350640505 is a wasteful number, since it uses less digits than its factorization.

350640505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149707.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 350640505 is about 18725.3973255576. The cubic root of 350640505 is about 705.1594998172.

Adding to 350640505 its reverse (505046053), we get a palindrome (855686558).

The spelling of 350640505 in words is "three hundred fifty million, six hundred forty thousand, five hundred five".