513660940 has 24 divisors (see below), whose sum is σ = 1161664560. Its totient is φ = 189659328.

The previous prime is 513660871. The next prime is 513661007. The reversal of 513660940 is 49066315.

513660940 = T₃₉₄₃ + T₃₉₄₄ + ... + T₄₀₀₇.

It is a super-2 number, since 2×513660940² = 527695122563367200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 513660896 and 513660905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 987550 + ... + 988069.

It is an arithmetic number, because the mean of its divisors is an integer number (48402690).

Almost surely, 2^513660940 is an apocalyptic number.

It is an amenable number.

513660940 is an abundant number, since it is smaller than the sum of its proper divisors (648003620).

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

513660940 is a wasteful number, since it uses less digits than its factorization.

513660940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1975641 (or 1975639 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 513660940 is about 22664.0892162028. The cubic root of 513660940 is about 800.8641391600.

The spelling of 513660940 in words is "five hundred thirteen million, six hundred sixty thousand, nine hundred forty".