1688344328 has 16 divisors (see below), whose sum is σ = 3453431760. Its totient is φ = 767429200.

The previous prime is 1688344321. The next prime is 1688344349. The reversal of 1688344328 is 8234438861.

It is not an unprimeable number, because it can be changed into a prime (1688344321) by changing a digit.

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, 9592778 + ... + 9592953.

It is an arithmetic number, because the mean of its divisors is an integer number (215839485).

Almost surely, 2^1688344328 is an apocalyptic number.

It is an amenable number.

1688344328 is an abundant number, since it is smaller than the sum of its proper divisors (1765087432).

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

1688344328 is a wasteful number, since it uses less digits than its factorization.

1688344328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19185748 (or 19185744 counting only the distinct ones).

The product of its digits is 884736, while the sum is 47.

The square root of 1688344328 is about 41089.4673608700. The cubic root of 1688344328 is about 1190.7493169292.

The spelling of 1688344328 in words is "one billion, six hundred eighty-eight million, three hundred forty-four thousand, three hundred twenty-eight".