3280240 has 40 divisors (see below), whose sum is σ = 7709328. Its totient is φ = 1297920.

The previous prime is 3280231. The next prime is 3280279. The reversal of 3280240 is 420823.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10324 + ... + 10636.

Almost surely, 2^3280240 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 3280240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3854664).

3280240 is an abundant number, since it is smaller than the sum of its proper divisors (4429088).

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

3280240 is a wasteful number, since it uses less digits than its factorization.

3280240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 3280240 is about 1811.1432853311. The cubic root of 3280240 is about 148.5828006229.

The spelling of 3280240 in words is "three million, two hundred eighty thousand, two hundred forty".