3320640 has 84 divisors (see below), whose sum is σ = 11431524. Its totient is φ = 884736.

The previous prime is 3320623. The next prime is 3320651. The reversal of 3320640 is 460233.

3320640 is a `hidden beast` number, since 3 + 3 + 20 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1937664 + 1382976 = 1392^2 + 1176^2 .

It is a super-2 number, since 2×3320640² = 22053300019200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2304 + ... + 3456.

Almost surely, 2^3320640 is an apocalyptic number.

3320640 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 3320640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5715762).

3320640 is an abundant number, since it is smaller than the sum of its proper divisors (8110884).

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

3320640 is a wasteful number, since it uses less digits than its factorization.

3320640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176 (or 1163 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 3320640 is about 1822.2623301819. The cubic root of 3320640 is about 149.1903038116.

Adding to 3320640 its reverse (460233), we get a palindrome (3780873).

The spelling of 3320640 in words is "three million, three hundred twenty thousand, six hundred forty".