520649408 has 14 divisors (see below), whose sum is σ = 1033163796. Its totient is φ = 260324672.

The previous prime is 520649407. The next prime is 520649491. The reversal of 520649408 is 804946025.

It is not an unprimeable number, because it can be changed into a prime (520649401) 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 as a sum of consecutive naturals, namely, 4067510 + ... + 4067637.

It is an arithmetic number, because the mean of its divisors is an integer number (73797414).

Almost surely, 2^520649408 is an apocalyptic number.

It is an amenable number.

520649408 is a deficient number, since it is larger than the sum of its proper divisors (512514388).

520649408 is an equidigital number, since it uses as much as digits as its factorization.

520649408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8135159 (or 8135149 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 520649408 is about 22817.7432714105. The cubic root of 520649408 is about 804.4797677772.

The spelling of 520649408 in words is "five hundred twenty million, six hundred forty-nine thousand, four hundred eight".