3869656 has 32 divisors (see below), whose sum is σ = 8490240. Its totient is φ = 1618848.

The previous prime is 3869653. The next prime is 3869683. The reversal of 3869656 is 6569683.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3869653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1605 + ... + 3211.

It is an arithmetic number, because the mean of its divisors is an integer number (265320).

Almost surely, 2^3869656 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 3869656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4245120).

3869656 is an abundant number, since it is smaller than the sum of its proper divisors (4620584).

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

3869656 is a wasteful number, since it uses less digits than its factorization.

3869656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663 (or 1659 counting only the distinct ones).

The product of its digits is 233280, while the sum is 43.

The square root of 3869656 is about 1967.1441228339. The cubic root of 3869656 is about 156.9967949364.

The spelling of 3869656 in words is "three million, eight hundred sixty-nine thousand, six hundred fifty-six".