1687396 has 12 divisors (see below), whose sum is σ = 3025260. Its totient is φ = 823040.

The previous prime is 1687393. The next prime is 1687421. The reversal of 1687396 is 6937861.

It can be written as a sum of positive squares in 2 ways, for example, as 746496 + 940900 = 864^2 + 970^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4981 + ... + 5308.

It is an arithmetic number, because the mean of its divisors is an integer number (252105).

2^1687396 is an apocalyptic number.

It is an amenable number.

1687396 is a deficient number, since it is larger than the sum of its proper divisors (1337864).

1687396 is a wasteful number, since it uses less digits than its factorization.

1687396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10334 (or 10332 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 1687396 is about 1298.9980754412. The cubic root of 1687396 is about 119.0526330739.

The spelling of 1687396 in words is "one million, six hundred eighty-seven thousand, three hundred ninety-six".