505120538 has 16 divisors (see below), whose sum is σ = 818399400. Its totient is φ = 232436736.

The previous prime is 505120531. The next prime is 505120543. The reversal of 505120538 is 835021505.

It can be written as a sum of positive squares in 4 ways, for example, as 447618649 + 57501889 = 21157^2 + 7583^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 505120538.

It is not an unprimeable number, because it can be changed into a prime (505120531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20063 + ... + 37586.

Almost surely, 2^505120538 is an apocalyptic number.

505120538 is a deficient number, since it is larger than the sum of its proper divisors (313278862).

505120538 is a wasteful number, since it uses less digits than its factorization.

505120538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58001.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 505120538 is about 22474.8868295260. The cubic root of 505120538 is about 796.4007781619.

The spelling of 505120538 in words is "five hundred five million, one hundred twenty thousand, five hundred thirty-eight".