3278320640 has 352 divisors, whose sum is σ = 9706120704. Its totient is φ = 1038090240.

The previous prime is 3278320609. The next prime is 3278320651. The reversal of 3278320640 is 460238723.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 3278320640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33797072 + ... + 33797168.

Almost surely, 2^3278320640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3278320640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4853060352).

3278320640 is an abundant number, since it is smaller than the sum of its proper divisors (6427800064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3278320640 is a wasteful number, since it uses less digits than its factorization.

3278320640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 3278320640 is about 57256.6209271906. The cubic root of 3278320640 is about 1485.5381498717.

The spelling of 3278320640 in words is "three billion, two hundred seventy-eight million, three hundred twenty thousand, six hundred forty".