3649856 has 28 divisors (see below), whose sum is σ = 8278368. Its totient is φ = 1564032.

The previous prime is 3649831. The next prime is 3649871. The reversal of 3649856 is 6589463.

It is a tau number, because it is divible by the number of its divisors (28).

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, 3626 + ... + 4521.

It is an arithmetic number, because the mean of its divisors is an integer number (295656).

Almost surely, 2^3649856 is an apocalyptic number.

It is an amenable number.

3649856 is an abundant number, since it is smaller than the sum of its proper divisors (4628512).

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

3649856 is an equidigital number, since it uses as much as digits as its factorization.

3649856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8166 (or 8156 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The square root of 3649856 is about 1910.4596305601. The cubic root of 3649856 is about 153.9661476162.

The spelling of 3649856 in words is "three million, six hundred forty-nine thousand, eight hundred fifty-six".