512316640 has 48 divisors (see below), whose sum is σ = 1320384240. Its totient is φ = 186296320.

The previous prime is 512316611. The next prime is 512316713. The reversal of 512316640 is 46613215.

It is a junction number, because it is equal to n+sod(n) for n = 512316599 and 512316608.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 143785 + ... + 147304.

It is an arithmetic number, because the mean of its divisors is an integer number (27508005).

Almost surely, 2^512316640 is an apocalyptic number.

It is an amenable number.

512316640 is an abundant number, since it is smaller than the sum of its proper divisors (808067600).

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

512316640 is a wasteful number, since it uses less digits than its factorization.

512316640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291115 (or 291107 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 512316640 is about 22634.4127381295. The cubic root of 512316640 is about 800.1648826815.

Adding to 512316640 its reverse (46613215), we get a palindrome (558929855).

The spelling of 512316640 in words is "five hundred twelve million, three hundred sixteen thousand, six hundred forty".