515878340 has 12 divisors (see below), whose sum is σ = 1083344556. Its totient is φ = 206351328.

The previous prime is 515878289. The next prime is 515878343. The reversal of 515878340 is 43878515.

It can be written as a sum of positive squares in 2 ways, for example, as 369177796 + 146700544 = 19214^2 + 12112^2 .

It is a super-2 number, since 2×515878340² = 532260923362311200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (515878343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12896939 + ... + 12896978.

It is an arithmetic number, because the mean of its divisors is an integer number (90278713).

Almost surely, 2^515878340 is an apocalyptic number.

It is an amenable number.

515878340 is an abundant number, since it is smaller than the sum of its proper divisors (567466216).

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

515878340 is a wasteful number, since it uses less digits than its factorization.

515878340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25793926 (or 25793924 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 515878340 is about 22712.9553339058. The cubic root of 515878340 is about 802.0148897636.

The spelling of 515878340 in words is "five hundred fifteen million, eight hundred seventy-eight thousand, three hundred forty".