1688872 has 32 divisors (see below), whose sum is σ = 3427200. Its totient is φ = 777600.

The previous prime is 1688861. The next prime is 1688887. The reversal of 1688872 is 2788861.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6097 + ... + 6367.

It is an arithmetic number, because the mean of its divisors is an integer number (107100).

2^1688872 is an apocalyptic number.

It is an amenable number.

1688872 is an abundant number, since it is smaller than the sum of its proper divisors (1738328).

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

1688872 is a wasteful number, since it uses less digits than its factorization.

1688872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 333 counting only the distinct ones).

The product of its digits is 43008, while the sum is 40.

The square root of 1688872 is about 1299.5660814287. The cubic root of 1688872 is about 119.0873355534.

It can be divided in two parts, 16 and 88872, that added together give a palindrome (88888).

The spelling of 1688872 in words is "one million, six hundred eighty-eight thousand, eight hundred seventy-two".