520680986 has 16 divisors (see below), whose sum is σ = 905919936. Its totient is φ = 219818016.

The previous prime is 520680971. The next prime is 520680989. The reversal of 520680986 is 689086025.

It is a happy number.

It is a super-2 number, since 2×520680986² = 542217378363864392, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (520680989) 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, 276611 + ... + 278486.

It is an arithmetic number, because the mean of its divisors is an integer number (56619996).

Almost surely, 2^520680986 is an apocalyptic number.

520680986 is a deficient number, since it is larger than the sum of its proper divisors (385238950).

520680986 is a wasteful number, since it uses less digits than its factorization.

520680986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555173.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 520680986 is about 22818.4352224249. The cubic root of 520680986 is about 804.4960316636.

The spelling of 520680986 in words is "five hundred twenty million, six hundred eighty thousand, nine hundred eighty-six".