It is an ABA number since it can be written as A⋅BA, here for A=3, B=100.
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a nialpdrome in base 10.
It is an unprimeable number.
Almost surely, 23000000 is an apocalyptic number.
3000000 is a gapful number since it is divisible by the number (30) 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 3000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4960874).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
3000000 is an frugal number, since it uses more digits than its factorization.
3000000 is an evil number, because the sum of its binary digits is even.
The square root of 3000000 is about 1732.0508075689. The cubic root of 3000000 is about 144.2249570307.