511040840 has 64 divisors (see below), whose sum is σ = 1178550000. Its totient is φ = 199360512.

The previous prime is 511040839. The next prime is 511040861. The reversal of 511040840 is 48040115.

It can be written as a sum of positive squares in 8 ways, for example, as 186104164 + 324936676 = 13642^2 + 18026^2 .

It is a super-2 number, since 2×511040840² = 522325480295811200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408536 + ... + 409784.

Almost surely, 2^511040840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 511040840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (589275000).

511040840 is an abundant number, since it is smaller than the sum of its proper divisors (667509160).

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

511040840 is a wasteful number, since it uses less digits than its factorization.

511040840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506 (or 1502 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 511040840 is about 22606.2124204830. The cubic root of 511040840 is about 799.5001252216.

Adding to 511040840 its reverse (48040115), we get a palindrome (559080955).

The spelling of 511040840 in words is "five hundred eleven million, forty thousand, eight hundred forty".