520307890 has 16 divisors (see below), whose sum is σ = 954226008. Its totient is φ = 204196096.

The previous prime is 520307881. The next prime is 520307897. The reversal of 520307890 is 98703025.

It can be written as a sum of positive squares in 4 ways, for example, as 291965569 + 228342321 = 17087^2 + 15111^2 .

It is not an unprimeable number, because it can be changed into a prime (520307897) 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, 490327 + ... + 491386.

Almost surely, 2^520307890 is an apocalyptic number.

520307890 is a deficient number, since it is larger than the sum of its proper divisors (433918118).

520307890 is a wasteful number, since it uses less digits than its factorization.

520307890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981773.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 520307890 is about 22810.2584378170. The cubic root of 520307890 is about 804.3038308213.

The spelling of 520307890 in words is "five hundred twenty million, three hundred seven thousand, eight hundred ninety".