1688751892 has 12 divisors (see below), whose sum is σ = 2956060800. Its totient is φ = 844163096.

The previous prime is 1688751887. The next prime is 1688751907. The reversal of 1688751892 is 2981578861.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34642 + ... + 67657.

It is an arithmetic number, because the mean of its divisors is an integer number (246338400).

Almost surely, 2^1688751892 is an apocalyptic number.

It is an amenable number.

1688751892 is a deficient number, since it is larger than the sum of its proper divisors (1267308908).

1688751892 is a wasteful number, since it uses less digits than its factorization.

1688751892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106430 (or 106428 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 55.

The square root of 1688751892 is about 41094.4265320737. The cubic root of 1688751892 is about 1190.8451243032.

The spelling of 1688751892 in words is "one billion, six hundred eighty-eight million, seven hundred fifty-one thousand, eight hundred ninety-two".