3304640 has 56 divisors (see below), whose sum is σ = 8229600. Its totient is φ = 1261568.

The previous prime is 3304633. The next prime is 3304643. The reversal of 3304640 is 464033.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (3304643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7136 + ... + 7584.

Almost surely, 2^3304640 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 3304640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4114800).

3304640 is an abundant number, since it is smaller than the sum of its proper divisors (4924960).

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

3304640 is a wasteful number, since it uses less digits than its factorization.

3304640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 3304640 is about 1817.8668818151. The cubic root of 3304640 is about 148.9503009780.

Adding to 3304640 its reverse (464033), we get a palindrome (3768673).

The spelling of 3304640 in words is "three million, three hundred four thousand, six hundred forty".