3645920 has 24 divisors (see below), whose sum is σ = 8613864. Its totient is φ = 1458304.

The previous prime is 3645913. The next prime is 3645949. The reversal of 3645920 is 295463.

3645920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11234 + ... + 11553.

It is an arithmetic number, because the mean of its divisors is an integer number (358911).

Almost surely, 2^3645920 is an apocalyptic number.

It is an amenable number.

3645920 is an abundant number, since it is smaller than the sum of its proper divisors (4967944).

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

3645920 is a wasteful number, since it uses less digits than its factorization.

3645920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22802 (or 22794 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 3645920 is about 1909.4292340906. The cubic root of 3645920 is about 153.9107820777.

The spelling of 3645920 in words is "three million, six hundred forty-five thousand, nine hundred twenty".