It is a happy number.
It is a tau number, because it is divible by the number of its divisors (252).
It is a congruent number.
It is an unprimeable number.
22721600 is an apocalyptic number.
2721600 is a gapful number since it is divisible by the number (20) 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 2721600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5732272).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2721600 is an equidigital number, since it uses as much as digits as its factorization.
2721600 is an evil number, because the sum of its binary digits is even.
The square root of 2721600 is about 1649.7272501841. The cubic root of 2721600 is about 139.6180062870.
Adding to 2721600 its reverse (61272), we get a palindrome (2782872).
The spelling of 2721600 in words is "two million, seven hundred twenty-one thousand, six hundred".