1689516 has 36 divisors (see below), whose sum is σ = 4337424. Its totient is φ = 554400.

The previous prime is 1689503. The next prime is 1689521. The reversal of 1689516 is 6159861.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2226 + ... + 2886.

It is an arithmetic number, because the mean of its divisors is an integer number (120484).

2^1689516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1689516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2168712).

1689516 is an abundant number, since it is smaller than the sum of its proper divisors (2647908).

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

1689516 is a wasteful number, since it uses less digits than its factorization.

1689516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 737 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1689516 is about 1299.8138328238. The cubic root of 1689516 is about 119.1024704084.

The spelling of 1689516 in words is "one million, six hundred eighty-nine thousand, five hundred sixteen".