3221940 has 24 divisors (see below), whose sum is σ = 9021600. Its totient is φ = 859168.

The previous prime is 3221917. The next prime is 3221941. The reversal of 3221940 is 491223.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221941) 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, 26790 + ... + 26909.

It is an arithmetic number, because the mean of its divisors is an integer number (375900).

Almost surely, 2^3221940 is an apocalyptic number.

3221940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3221940 is an abundant number, since it is smaller than the sum of its proper divisors (5799660).

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

3221940 is a wasteful number, since it uses less digits than its factorization.

3221940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53711 (or 53709 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 3221940 is about 1794.9763229636. The cubic root of 3221940 is about 147.6972750566.

The spelling of 3221940 in words is "three million, two hundred twenty-one thousand, nine hundred forty".