520200040 has 32 divisors (see below), whose sum is σ = 1171701000. Its totient is φ = 207857664.

The previous prime is 520200029. The next prime is 520200049. The reversal of 520200040 is 40002025.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 407797636 + 112402404 = 20194^2 + 10602^2 .

It is not an unprimeable number, because it can be changed into a prime (520200049) 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, 33916 + ... + 46804.

Almost surely, 2^520200040 is an apocalyptic number.

It is an amenable number.

520200040 is an abundant number, since it is smaller than the sum of its proper divisors (651500960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520200040 is a wasteful number, since it uses less digits than its factorization.

520200040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13909 (or 13905 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 520200040 is about 22807.8942473872. The cubic root of 520200040 is about 804.2482546494.

Adding to 520200040 its reverse (40002025), we get a palindrome (560202065).

The spelling of 520200040 in words is "five hundred twenty million, two hundred thousand, forty".