1689268 has 12 divisors (see below), whose sum is σ = 3378592. Its totient is φ = 723960.

The previous prime is 1689263. The next prime is 1689277. The reversal of 1689268 is 8629861.

1689268 is an admirable number.

It is an Ulam number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 1689268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689263) by changing a digit.

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, 30138 + ... + 30193.

2^1689268 is an apocalyptic number.

It is an amenable number.

1689268 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1689268 is a wasteful number, since it uses less digits than its factorization.

1689268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60342 (or 60340 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 1689268 is about 1299.7184310457. The cubic root of 1689268 is about 119.0966425346.

The spelling of 1689268 in words is "one million, six hundred eighty-nine thousand, two hundred sixty-eight".