1686790828 has 12 divisors (see below), whose sum is σ = 2968948080. Its totient is φ = 838519952.

The previous prime is 1686790801. The next prime is 1686790841. The reversal of 1686790828 is 8280976861.

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, 1218088 + ... + 1219471.

It is an arithmetic number, because the mean of its divisors is an integer number (247412340).

Almost surely, 2^1686790828 is an apocalyptic number.

It is an amenable number.

1686790828 is a deficient number, since it is larger than the sum of its proper divisors (1282157252).

1686790828 is a wasteful number, since it uses less digits than its factorization.

1686790828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437736 (or 2437734 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 55.

The square root of 1686790828 is about 41070.5591391206. The cubic root of 1686790828 is about 1190.3839892557.

The spelling of 1686790828 in words is "one billion, six hundred eighty-six million, seven hundred ninety thousand, eight hundred twenty-eight".