505145438 has 32 divisors (see below), whose sum is σ = 928765440. Its totient is φ = 201221280.

The previous prime is 505145413. The next prime is 505145477. The reversal of 505145438 is 834541505.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 505145398 and 505145407.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 3818 + ... + 32013.

It is an arithmetic number, because the mean of its divisors is an integer number (29023920).

Almost surely, 2^505145438 is an apocalyptic number.

505145438 is a deficient number, since it is larger than the sum of its proper divisors (423620002).

505145438 is a wasteful number, since it uses less digits than its factorization.

505145438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35912.

The product of its (nonzero) digits is 48000, while the sum is 35.

The square root of 505145438 is about 22475.4407743208. The cubic root of 505145438 is about 796.4138641827.

The spelling of 505145438 in words is "five hundred five million, one hundred forty-five thousand, four hundred thirty-eight".