1689236 has 6 divisors (see below), whose sum is σ = 2956170. Its totient is φ = 844616.

The previous prime is 1689217. The next prime is 1689253. The reversal of 1689236 is 6329861.

It can be written as a sum of positive squares in only one way, i.e., 1562500 + 126736 = 1250^2 + 356^2 .

It is a super-3 number, since 3×1689236³ = 14460797333078328768, which contains 333 as substring.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 1689196 and 1689205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211151 + ... + 211158.

It is an arithmetic number, because the mean of its divisors is an integer number (492695).

2^1689236 is an apocalyptic number.

It is an amenable number.

1689236 is a deficient number, since it is larger than the sum of its proper divisors (1266934).

1689236 is a wasteful number, since it uses less digits than its factorization.

1689236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422313 (or 422311 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 1689236 is about 1299.7061206288. The cubic root of 1689236 is about 119.0958905093.

The spelling of 1689236 in words is "one million, six hundred eighty-nine thousand, two hundred thirty-six".