It is a nialpdrome in base 4 and base 16.
It is a zygodrome in base 4.
It is an unprimeable number.
In principle, a polygon with 699040 sides can be constructed with ruler and compass.
2699040 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 699040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (877716).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
699040 is a wasteful number, since it uses less digits than its factorization.
699040 is an evil number, because the sum of its binary digits is even.
The square root of 699040 is about 836.0861199661. The cubic root of 699040 is about 88.7497917075.
The spelling of 699040 in words is "six hundred ninety-nine thousand, forty".