1688342 has 8 divisors (see below), whose sum is σ = 2541456. Its totient is φ = 841192.

The previous prime is 1688341. The next prime is 1688363. The reversal of 1688342 is 2438861.

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

It is a d-powerful number, because it can be written as 1 + 6⁸ + 8 + 8³ + 3² + 4 + 2¹³ .

It is a junction number, because it is equal to n+sod(n) for n = 1688299 and 1688308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698 + ... + 1965.

It is an arithmetic number, because the mean of its divisors is an integer number (317682).

2^1688342 is an apocalyptic number.

1688342 is a deficient number, since it is larger than the sum of its proper divisors (853114).

1688342 is a wasteful number, since it uses less digits than its factorization.

1688342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2982.

The product of its digits is 9216, while the sum is 32.

The square root of 1688342 is about 1299.3621512111. The cubic root of 1688342 is about 119.0748769635.

The spelling of 1688342 in words is "one million, six hundred eighty-eight thousand, three hundred forty-two".