1686093906 has 32 divisors (see below), whose sum is σ = 3978252288. Its totient is φ = 466200720.

The previous prime is 1686093889. The next prime is 1686093931. The reversal of 1686093906 is 6093906861.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 646200 + ... + 648803.

It is an arithmetic number, because the mean of its divisors is an integer number (124320384).

Almost surely, 2^1686093906 is an apocalyptic number.

1686093906 is an abundant number, since it is smaller than the sum of its proper divisors (2292158382).

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

1686093906 is a wasteful number, since it uses less digits than its factorization.

1686093906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295046.

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 1686093906 is about 41062.0738151399. The cubic root of 1686093906 is about 1190.2200252246.

The spelling of 1686093906 in words is "one billion, six hundred eighty-six million, ninety-three thousand, nine hundred six".