3581856 has 36 divisors (see below), whose sum is σ = 10186722. Its totient is φ = 1193856.

The previous prime is 3581843. The next prime is 3581867. The reversal of 3581856 is 6581853.

3581856 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 only one way, i.e., 3549456 + 32400 = 1884^2 + 180^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 3581856.

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 5 ways as a sum of consecutive naturals, for example, 5931 + ... + 6506.

Almost surely, 2^3581856 is an apocalyptic number.

3581856 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3581856 is an abundant number, since it is smaller than the sum of its proper divisors (6604866).

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

3581856 is a wasteful number, since it uses less digits than its factorization.

3581856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12453 (or 12442 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 3581856 is about 1892.5791925307. The cubic root of 3581856 is about 153.0039727278.

The spelling of 3581856 in words is "three million, five hundred eighty-one thousand, eight hundred fifty-six".