It is a congruent number.
It is an unprimeable number.
22281620 is an apocalyptic number.
2281620 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 pseudoperfect number, because it is the sum of a subset of its proper divisors.
2281620 is a wasteful number, since it uses less digits than its factorization.
2281620 is an evil number, because the sum of its binary digits is even.
The square root of 2281620 is about 1510.5032274047. The cubic root of 2281620 is about 131.6480523455.
The spelling of 2281620 in words is "two million, two hundred eighty-one thousand, six hundred twenty".