3321820 has 24 divisors (see below), whose sum is σ = 7147728. Its totient is φ = 1296000.

The previous prime is 3321781. The next prime is 3321841. The reversal of 3321820 is 281233.

It is a happy number.

It is a super-2 number, since 2×3321820² = 22068976224800, 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 7 ways as a sum of consecutive naturals, for example, 1206 + ... + 2845.

It is an arithmetic number, because the mean of its divisors is an integer number (297822).

Almost surely, 2^3321820 is an apocalyptic number.

It is an amenable number.

3321820 is an abundant number, since it is smaller than the sum of its proper divisors (3825908).

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

3321820 is a wasteful number, since it uses less digits than its factorization.

3321820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4101 (or 4099 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 3321820 is about 1822.5860747849. The cubic root of 3321820 is about 149.2079734686.

The spelling of 3321820 in words is "three million, three hundred twenty-one thousand, eight hundred twenty".