1688133884 has 6 divisors (see below), whose sum is σ = 2954234304. Its totient is φ = 844066940.

The previous prime is 1688133871. The next prime is 1688133961. The reversal of 1688133884 is 4883318861.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211016732 + ... + 211016739.

It is an arithmetic number, because the mean of its divisors is an integer number (492372384).

Almost surely, 2^1688133884 is an apocalyptic number.

It is an amenable number.

1688133884 is a deficient number, since it is larger than the sum of its proper divisors (1266100420).

1688133884 is a wasteful number, since it uses less digits than its factorization.

1688133884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422033475 (or 422033473 counting only the distinct ones).

The product of its digits is 884736, while the sum is 50.

The square root of 1688133884 is about 41086.9064788285. The cubic root of 1688133884 is about 1190.6998411485.

The spelling of 1688133884 in words is "one billion, six hundred eighty-eight million, one hundred thirty-three thousand, eight hundred eighty-four".