3243920 has 80 divisors (see below), whose sum is σ = 8249472. Its totient is φ = 1182720.

The previous prime is 3243917. The next prime is 3243931. The reversal of 3243920 is 293423.

3243920 = T₁₁ + T₁₂ + ... + T₂₆₈.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 75419 + ... + 75461.

Almost surely, 2^3243920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3243920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4124736).

3243920 is an abundant number, since it is smaller than the sum of its proper divisors (5005552).

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

3243920 is a wasteful number, since it uses less digits than its factorization.

3243920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 3243920 is about 1801.0885597327. The cubic root of 3243920 is about 148.0323766518.

The spelling of 3243920 in words is "three million, two hundred forty-three thousand, nine hundred twenty".