3581656 has 16 divisors (see below), whose sum is σ = 7232400. Its totient is φ = 1653024.

The previous prime is 3581651. The next prime is 3581663. The reversal of 3581656 is 6561853.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3581651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17116 + ... + 17323.

It is an arithmetic number, because the mean of its divisors is an integer number (452025).

Almost surely, 2^3581656 is an apocalyptic number.

It is an amenable number.

3581656 is an abundant number, since it is smaller than the sum of its proper divisors (3650744).

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

3581656 is a wasteful number, since it uses less digits than its factorization.

3581656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34458 (or 34454 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 3581656 is about 1892.5263538456. The cubic root of 3581656 is about 153.0011249152.

The spelling of 3581656 in words is "three million, five hundred eighty-one thousand, six hundred fifty-six".