513980638 has 16 divisors (see below), whose sum is σ = 776042496. Its totient is φ = 255305880.

The previous prime is 513980603. The next prime is 513980641. The reversal of 513980638 is 836089315.

It is a junction number, because it is equal to n+sod(n) for n = 513980594 and 513980603.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 215593 + ... + 217963.

It is an arithmetic number, because the mean of its divisors is an integer number (48502656).

Almost surely, 2^513980638 is an apocalyptic number.

513980638 is a deficient number, since it is larger than the sum of its proper divisors (262061858).

513980638 is a wasteful number, since it uses less digits than its factorization.

513980638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3039.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 513980638 is about 22671.1410828833. The cubic root of 513980638 is about 801.0302549406.

The spelling of 513980638 in words is "five hundred thirteen million, nine hundred eighty thousand, six hundred thirty-eight".