505139746 has 16 divisors (see below), whose sum is σ = 768240000. Its totient is φ = 249067728.

The previous prime is 505139729. The next prime is 505139749. The reversal of 505139746 is 647931505.

It is a junction number, because it is equal to n+sod(n) for n = 505139699 and 505139708.

It is not an unprimeable number, because it can be changed into a prime (505139749) 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, 182380 + ... + 185128.

It is an arithmetic number, because the mean of its divisors is an integer number (48015000).

Almost surely, 2^505139746 is an apocalyptic number.

505139746 is a deficient number, since it is larger than the sum of its proper divisors (263100254).

505139746 is a wasteful number, since it uses less digits than its factorization.

505139746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 505139746 is about 22475.3141468590. The cubic root of 505139746 is about 796.4108728299.

The spelling of 505139746 in words is "five hundred five million, one hundred thirty-nine thousand, seven hundred forty-six".