1689402 has 48 divisors (see below), whose sum is σ = 4021920. Its totient is φ = 469920.

The previous prime is 1689397. The next prime is 1689431. The reversal of 1689402 is 2049861.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 1689402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9349 + ... + 9527.

It is an arithmetic number, because the mean of its divisors is an integer number (83790).

2^1689402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1689402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2010960).

1689402 is an abundant number, since it is smaller than the sum of its proper divisors (2332518).

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

1689402 is a wasteful number, since it uses less digits than its factorization.

1689402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1689402 is about 1299.7699796502. The cubic root of 1689402 is about 119.0997915372.

The spelling of 1689402 in words is "one million, six hundred eighty-nine thousand, four hundred two".