505861138 has 8 divisors (see below), whose sum is σ = 759056688. Its totient is φ = 252842244.

The previous prime is 505861091. The next prime is 505861201. The reversal of 505861138 is 831168505.

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

It is a junction number, because it is equal to n+sod(n) for n = 505861097 and 505861106.

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 3 ways as a sum of consecutive naturals, for example, 36756 + ... + 48607.

It is an arithmetic number, because the mean of its divisors is an integer number (94882086).

Almost surely, 2^505861138 is an apocalyptic number.

505861138 is a deficient number, since it is larger than the sum of its proper divisors (253195550).

505861138 is a wasteful number, since it uses less digits than its factorization.

505861138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88328.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 505861138 is about 22491.3569621755. The cubic root of 505861138 is about 796.7898116352.

The spelling of 505861138 in words is "five hundred five million, eight hundred sixty-one thousand, one hundred thirty-eight".