1689930 has 64 divisors (see below), whose sum is σ = 4924800. Its totient is φ = 408960.

The previous prime is 1689929. The next prime is 1689931. The reversal of 1689930 is 399861.

It is an interprime number because it is at equal distance from previous prime (1689929) and next prime (1689931).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1689931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2686 + ... + 3254.

It is an arithmetic number, because the mean of its divisors is an integer number (76950).

2^1689930 is an apocalyptic number.

1689930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1689930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2462400).

1689930 is an abundant number, since it is smaller than the sum of its proper divisors (3234870).

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

1689930 is a wasteful number, since it uses less digits than its factorization.

1689930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 590 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1689930 is about 1299.9730766443. The cubic root of 1689930 is about 119.1121979271.

The spelling of 1689930 in words is "one million, six hundred eighty-nine thousand, nine hundred thirty".