520840706 has 4 divisors (see below), whose sum is σ = 781261062. Its totient is φ = 260420352.

The previous prime is 520840693. The next prime is 520840751. The reversal of 520840706 is 607048025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 274068025 + 246772681 = 16555^2 + 15709^2 .

It is a Curzon number.

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 as a sum of consecutive naturals, namely, 130210175 + ... + 130210178.

Almost surely, 2^520840706 is an apocalyptic number.

520840706 is a deficient number, since it is larger than the sum of its proper divisors (260420356).

520840706 is a wasteful number, since it uses less digits than its factorization.

520840706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260420355.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 520840706 is about 22821.9347558440. The cubic root of 520840706 is about 804.5782835435.

The spelling of 520840706 in words is "five hundred twenty million, eight hundred forty thousand, seven hundred six".