520653540 has 48 divisors (see below), whose sum is σ = 1590361920. Its totient is φ = 126218880.

The previous prime is 520653521. The next prime is 520653557. The reversal of 520653540 is 45356025.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 520653498 and 520653507.

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 in 15 ways as a sum of consecutive naturals, for example, 393775 + ... + 395094.

It is an arithmetic number, because the mean of its divisors is an integer number (33132540).

Almost surely, 2^520653540 is an apocalyptic number.

It is an amenable number.

520653540 is an abundant number, since it is smaller than the sum of its proper divisors (1069708380).

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

520653540 is a wasteful number, since it uses less digits than its factorization.

520653540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788892 (or 788890 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 520653540 is about 22817.8338148037. The cubic root of 520653540 is about 804.4818959537.

The spelling of 520653540 in words is "five hundred twenty million, six hundred fifty-three thousand, five hundred forty".