3278499840 is a `hidden beast` number, since 3 + 2 + 78 + 499 + 84 + 0 = 666.
It is a congruent number.
It is an unprimeable number.
Almost surely, 23278499840 is an apocalyptic number.
3278499840 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 3278499840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7451516520).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
3278499840 is a wasteful number, since it uses less digits than its factorization.
3278499840 is an evil number, because the sum of its binary digits is even.
The square root of 3278499840 is about 57258.1857903305. The cubic root of 3278499840 is about 1485.5652169400.
The spelling of 3278499840 in words is "three billion, two hundred seventy-eight million, four hundred ninety-nine thousand, eight hundred forty".