512643478 has 16 divisors (see below), whose sum is σ = 777685536. Its totient is φ = 253422400.

The previous prime is 512643457. The next prime is 512643487. The reversal of 512643478 is 874346215.

It is a self number, because there is not a number n which added to its sum of digits gives 512643478.

It is a congruent number.

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, 191175 + ... + 193837.

It is an arithmetic number, because the mean of its divisors is an integer number (48605346).

Almost surely, 2^512643478 is an apocalyptic number.

512643478 is a deficient number, since it is larger than the sum of its proper divisors (265042058).

512643478 is a wasteful number, since it uses less digits than its factorization.

512643478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3719.

The product of its digits is 161280, while the sum is 40.

The square root of 512643478 is about 22641.6315224853. The cubic root of 512643478 is about 800.3350044871.

The spelling of 512643478 in words is "five hundred twelve million, six hundred forty-three thousand, four hundred seventy-eight".