3555920 has 20 divisors (see below), whose sum is σ = 8267700. Its totient is φ = 1422336.

The previous prime is 3555913. The next prime is 3555943. The reversal of 3555920 is 295553.

It can be written as a sum of positive squares in 2 ways, for example, as 2238016 + 1317904 = 1496^2 + 1148^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22145 + ... + 22304.

It is an arithmetic number, because the mean of its divisors is an integer number (413385).

Almost surely, 2^3555920 is an apocalyptic number.

It is an amenable number.

3555920 is an abundant number, since it is smaller than the sum of its proper divisors (4711780).

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

3555920 is a wasteful number, since it uses less digits than its factorization.

3555920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44462 (or 44456 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 29.

The square root of 3555920 is about 1885.7147186147. The cubic root of 3555920 is about 152.6337803049.

It can be divided in two parts, 35 and 55920, that added together give a palindrome (55955).

The spelling of 3555920 in words is "three million, five hundred fifty-five thousand, nine hundred twenty".