1679688 has 48 divisors (see below), whose sum is σ = 4668300. Its totient is φ = 545280.

The previous prime is 1679687. The next prime is 1679693. The reversal of 1679688 is 8869761.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1340964 + 338724 = 1158^2 + 582^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2668 + ... + 3236.

2^1679688 is an apocalyptic number.

1679688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1679688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2334150).

1679688 is an abundant number, since it is smaller than the sum of its proper divisors (2988612).

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

1679688 is a wasteful number, since it uses less digits than its factorization.

1679688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 615 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 1679688 is about 1296.0277774801. The cubic root of 1679688 is about 118.8710794582.

The spelling of 1679688 in words is "one million, six hundred seventy-nine thousand, six hundred eighty-eight".