It is a self number, because there is not a number n which added to its sum of digits gives 27421440.
Almost surely, 227421440 is an apocalyptic number.
27421440 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 27421440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45205104).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
27421440 is a wasteful number, since it uses less digits than its factorization.
27421440 is an odious number, because the sum of its binary digits is odd.
The square root of 27421440 is about 5236.5484815859. The cubic root of 27421440 is about 301.5528373415.
The spelling of 27421440 in words is "twenty-seven million, four hundred twenty-one thousand, four hundred forty".