520686734 has 16 divisors (see below), whose sum is σ = 796530672. Its totient is φ = 255186048.

The previous prime is 520686713. The next prime is 520686737. The reversal of 520686734 is 437686025.

It is a happy number.

It is a super-2 number, since 2×520686734² = 542229349927173512, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 520686691 and 520686700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520686737) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 163037 + ... + 166199.

It is an arithmetic number, because the mean of its divisors is an integer number (49783167).

Almost surely, 2^520686734 is an apocalyptic number.

520686734 is a deficient number, since it is larger than the sum of its proper divisors (275843938).

520686734 is a wasteful number, since it uses less digits than its factorization.

520686734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4771.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 520686734 is about 22818.5611728698. The cubic root of 520686734 is about 804.4989920343.

The spelling of 520686734 in words is "five hundred twenty million, six hundred eighty-six thousand, seven hundred thirty-four".