3581840 has 20 divisors (see below), whose sum is σ = 8327964. Its totient is φ = 1432704.

The previous prime is 3581839. The next prime is 3581843. The reversal of 3581840 is 481853.

3581840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1860496 + 1721344 = 1364^2 + 1312^2 .

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

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (3581843) by changing a digit.

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, 22307 + ... + 22466.

Almost surely, 2^3581840 is an apocalyptic number.

It is an amenable number.

3581840 is an abundant number, since it is smaller than the sum of its proper divisors (4746124).

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

3581840 is a wasteful number, since it uses less digits than its factorization.

3581840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44786 (or 44780 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 3581840 is about 1892.5749654901. The cubic root of 3581840 is about 153.0037449067.

The spelling of 3581840 in words is "three million, five hundred eighty-one thousand, eight hundred forty".