3213660 has 48 divisors (see below), whose sum is σ = 9475200. Its totient is φ = 811584.

The previous prime is 3213659. The next prime is 3213689. The reversal of 3213660 is 663123.

It is a super-2 number, since 2×3213660² = 20655221191200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270 + ... + 2549.

It is an arithmetic number, because the mean of its divisors is an integer number (197400).

Almost surely, 2^3213660 is an apocalyptic number.

3213660 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 3213660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4737600).

3213660 is an abundant number, since it is smaller than the sum of its proper divisors (6261540).

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

3213660 is a wasteful number, since it uses less digits than its factorization.

3213660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2850 (or 2848 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 3213660 is about 1792.6684021313. The cubic root of 3213660 is about 147.5706450828.

Adding to 3213660 its reverse (663123), we get a palindrome (3876783).

The spelling of 3213660 in words is "three million, two hundred thirteen thousand, six hundred sixty".