520145340 has 96 divisors (see below), whose sum is σ = 1711051776. Its totient is φ = 116394240.

The previous prime is 520145309. The next prime is 520145359. The reversal of 520145340 is 43541025.

It is a self number, because there is not a number n which added to its sum of digits gives 520145340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21732 + ... + 38891.

It is an arithmetic number, because the mean of its divisors is an integer number (17823456).

Almost surely, 2^520145340 is an apocalyptic number.

It is an amenable number.

520145340 is an abundant number, since it is smaller than the sum of its proper divisors (1190906436).

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

520145340 is a wasteful number, since it uses less digits than its factorization.

520145340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60659 (or 60657 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 520145340 is about 22806.6950696501. The cubic root of 520145340 is about 804.2200642622.

Adding to 520145340 its reverse (43541025), we get a palindrome (563686365).

The spelling of 520145340 in words is "five hundred twenty million, one hundred forty-five thousand, three hundred forty".