1688396 has 6 divisors (see below), whose sum is σ = 2954700. Its totient is φ = 844196.

The previous prime is 1688387. The next prime is 1688411. The reversal of 1688396 is 6938861.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211046 + ... + 211053.

It is an arithmetic number, because the mean of its divisors is an integer number (492450).

2^1688396 is an apocalyptic number.

It is an amenable number.

1688396 is a deficient number, since it is larger than the sum of its proper divisors (1266304).

1688396 is a wasteful number, since it uses less digits than its factorization.

1688396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422103 (or 422101 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 1688396 is about 1299.3829304712. The cubic root of 1688396 is about 119.0761464485.

The spelling of 1688396 in words is "one million, six hundred eighty-eight thousand, three hundred ninety-six".