3205840 has 40 divisors (see below), whose sum is σ = 8133408. Its totient is φ = 1165440.

The previous prime is 3205837. The next prime is 3205849. The reversal of 3205840 is 485023.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3205849) 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, 942 + ... + 2701.

Almost surely, 2^3205840 is an apocalyptic number.

It is an amenable number.

3205840 is an abundant number, since it is smaller than the sum of its proper divisors (4927568).

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

3205840 is a wasteful number, since it uses less digits than its factorization.

3205840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3667 (or 3661 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 3205840 is about 1790.4859675518. The cubic root of 3205840 is about 147.4508502334.

The spelling of 3205840 in words is "three million, two hundred five thousand, eight hundred forty".