1688056 has 8 divisors (see below), whose sum is σ = 3165120. Its totient is φ = 844024.

The previous prime is 1688047. The next prime is 1688069. The reversal of 1688056 is 6508861.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a zygodrome in base 2.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 105496 + ... + 105511.

It is an arithmetic number, because the mean of its divisors is an integer number (395640).

2^1688056 is an apocalyptic number.

It is an amenable number.

1688056 is a deficient number, since it is larger than the sum of its proper divisors (1477064).

1688056 is a wasteful number, since it uses less digits than its factorization.

1688056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211013 (or 211009 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1688056 is about 1299.2520925517. The cubic root of 1688056 is about 119.0681529431.

The spelling of 1688056 in words is "one million, six hundred eighty-eight thousand, fifty-six".