520210408 has 8 divisors (see below), whose sum is σ = 975394530. Its totient is φ = 260105200.

The previous prime is 520210403. The next prime is 520210409. The reversal of 520210408 is 804012025.

It can be written as a sum of positive squares in only one way, i.e., 412008804 + 108201604 = 20298^2 + 10402^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (520210403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32513143 + ... + 32513158.

Almost surely, 2^520210408 is an apocalyptic number.

It is an amenable number.

520210408 is a deficient number, since it is larger than the sum of its proper divisors (455184122).

520210408 is a wasteful number, since it uses less digits than its factorization.

520210408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65026307 (or 65026303 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 520210408 is about 22808.1215359792. The cubic root of 520210408 is about 804.2535977160.

The spelling of 520210408 in words is "five hundred twenty million, two hundred ten thousand, four hundred eight".