1728006686 has 16 divisors (see below), whose sum is σ = 3031188864. Its totient is φ = 723351384.

The previous prime is 1728006649. The next prime is 1728006697. The reversal of 1728006686 is 6866008271.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1434620 + ... + 1435823.

It is an arithmetic number, because the mean of its divisors is an integer number (189449304).

Almost surely, 2^1728006686 is an apocalyptic number.

1728006686 is a deficient number, since it is larger than the sum of its proper divisors (1303182178).

1728006686 is a wasteful number, since it uses less digits than its factorization.

1728006686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870495.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 1728006686 is about 41569.2998016565. The cubic root of 1728006686 is about 1200.0015476832.

The spelling of 1728006686 in words is "one billion, seven hundred twenty-eight million, six thousand, six hundred eighty-six".