515345740 has 144 divisors (see below), whose sum is σ = 1427781600. Its totient is φ = 154441728.

The previous prime is 515345717. The next prime is 515345821. The reversal of 515345740 is 47543515.

It is a super-2 number, since 2×515345740² = 531162463472295200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 515345696 and 515345705.

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 47 ways as a sum of consecutive naturals, for example, 240996 + ... + 243124.

It is an arithmetic number, because the mean of its divisors is an integer number (9915150).

Almost surely, 2^515345740 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 515345740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (713890800).

515345740 is an abundant number, since it is smaller than the sum of its proper divisors (912435860).

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

515345740 is a wasteful number, since it uses less digits than its factorization.

515345740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184 (or 2175 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 515345740 is about 22701.2277201036. The cubic root of 515345740 is about 801.7387909362.

The spelling of 515345740 in words is "five hundred fifteen million, three hundred forty-five thousand, seven hundred forty".