512775440 has 20 divisors (see below), whose sum is σ = 1192203084. Its totient is φ = 205110144.

The previous prime is 512775421. The next prime is 512775443. The reversal of 512775440 is 44577215.

It can be written as a sum of positive squares in 2 ways, for example, as 129868816 + 382906624 = 11396^2 + 19568^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 512775440.

It is not an unprimeable number, because it can be changed into a prime (512775443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3204767 + ... + 3204926.

Almost surely, 2^512775440 is an apocalyptic number.

It is an amenable number.

512775440 is an abundant number, since it is smaller than the sum of its proper divisors (679427644).

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

512775440 is a wasteful number, since it uses less digits than its factorization.

512775440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6409706 (or 6409700 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 35.

The square root of 512775440 is about 22644.5454800930. The cubic root of 512775440 is about 800.4036712776.

The spelling of 512775440 in words is "five hundred twelve million, seven hundred seventy-five thousand, four hundred forty".