3656844 has 36 divisors (see below), whose sum is σ = 9316944. Its totient is φ = 1209312.

The previous prime is 3656843. The next prime is 3656857. The reversal of 3656844 is 4486563.

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 junction number, because it is equal to n+sod(n) for n = 3656799 and 3656808.

It is not an unprimeable number, because it can be changed into a prime (3656843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5329 + ... + 5975.

It is an arithmetic number, because the mean of its divisors is an integer number (258804).

Almost surely, 2^3656844 is an apocalyptic number.

It is an amenable number.

3656844 is an abundant number, since it is smaller than the sum of its proper divisors (5660100).

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

3656844 is a wasteful number, since it uses less digits than its factorization.

3656844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 809 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 3656844 is about 1912.2876352683. The cubic root of 3656844 is about 154.0643459671.

The spelling of 3656844 in words is "three million, six hundred fifty-six thousand, eight hundred forty-four".