3689856 has 48 divisors (see below), whose sum is σ = 10621260. Its totient is φ = 1229568.

The previous prime is 3689843. The next prime is 3689863. The reversal of 3689856 is 6589863.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 450 + ... + 2753.

Almost surely, 2^3689856 is an apocalyptic number.

3689856 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3689856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5310630).

3689856 is an abundant number, since it is smaller than the sum of its proper divisors (6931404).

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

3689856 is a wasteful number, since it uses less digits than its factorization.

3689856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223 (or 3208 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 3689856 is about 1920.8997891613. The cubic root of 3689856 is about 154.5265609282.

The spelling of 3689856 in words is "three million, six hundred eighty-nine thousand, eight hundred fifty-six".