1688813764 has 12 divisors (see below), whose sum is σ = 3224099088. Its totient is φ = 767642600.

The previous prime is 1688813743. The next prime is 1688813807. The reversal of 1688813764 is 4673188861.

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, 19191022 + ... + 19191109.

It is an arithmetic number, because the mean of its divisors is an integer number (268674924).

Almost surely, 2^1688813764 is an apocalyptic number.

It is an amenable number.

1688813764 is a deficient number, since it is larger than the sum of its proper divisors (1535285324).

1688813764 is a wasteful number, since it uses less digits than its factorization.

1688813764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38382146 (or 38382144 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 52.

The square root of 1688813764 is about 41095.1793279942. The cubic root of 1688813764 is about 1190.8596674045.

The spelling of 1688813764 in words is "one billion, six hundred eighty-eight million, eight hundred thirteen thousand, seven hundred sixty-four".