3609856 has 36 divisors (see below), whose sum is σ = 7358400. Its totient is φ = 1766912.

The previous prime is 3609847. The next prime is 3609863. The reversal of 3609856 is 6589063.

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, 14985 + ... + 15223.

It is an arithmetic number, because the mean of its divisors is an integer number (204400).

Almost surely, 2^3609856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3609856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3679200).

3609856 is an abundant number, since it is smaller than the sum of its proper divisors (3748544).

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

3609856 is an equidigital number, since it uses as much as digits as its factorization.

3609856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 3609856 is about 1899.9621048853. The cubic root of 3609856 is about 153.4016246945.

It can be divided in two parts, 3609 and 856, that added together give a triangular number (4465 = T₉₄).

The spelling of 3609856 in words is "three million, six hundred nine thousand, eight hundred fifty-six".