1686896764 has 12 divisors (see below), whose sum is σ = 3373793584. Its totient is φ = 722955744.

The previous prime is 1686896759. The next prime is 1686896777. The reversal of 1686896764 is 4676986861.

1686896764 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30123129 + ... + 30123184.

Almost surely, 2^1686896764 is an apocalyptic number.

1686896764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1686896764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1686896764 is a wasteful number, since it uses less digits than its factorization.

1686896764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60246324 (or 60246322 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 61.

The square root of 1686896764 is about 41071.8488018253. The cubic root of 1686896764 is about 1190.4089087411.

The spelling of 1686896764 in words is "one billion, six hundred eighty-six million, eight hundred ninety-six thousand, seven hundred sixty-four".