1688422 has 8 divisors (see below), whose sum is σ = 2545272. Its totient is φ = 840000.

The previous prime is 1688413. The next prime is 1688443. The reversal of 1688422 is 2248861.

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 1579 + ... + 2422.

It is an arithmetic number, because the mean of its divisors is an integer number (318159).

2^1688422 is an apocalyptic number.

1688422 is a deficient number, since it is larger than the sum of its proper divisors (856850).

1688422 is a wasteful number, since it uses less digits than its factorization.

1688422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4214.

The product of its digits is 6144, while the sum is 31.

The square root of 1688422 is about 1299.3929351817. The cubic root of 1688422 is about 119.0767576724.

It can be divided in two parts, 1688 and 422, that multiplied together give a square (712336 = 844²).

The spelling of 1688422 in words is "one million, six hundred eighty-eight thousand, four hundred twenty-two".