3868656 has 80 divisors (see below), whose sum is σ = 11570688. Its totient is φ = 1100800.

The previous prime is 3868649. The next prime is 3868679. The reversal of 3868656 is 6568683.

3868656 = T₁₄₄ + T₁₄₅ + ... + T₂₉₆.

It is a d-powerful number, because it can be written as 3¹³ + 8³ + 6³ + 8⁵ + 6⁵ + 5⁹ + 6⁷ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8761 + ... + 9191.

Almost surely, 2^3868656 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 3868656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5785344).

3868656 is an abundant number, since it is smaller than the sum of its proper divisors (7702032).

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

3868656 is a wasteful number, since it uses less digits than its factorization.

3868656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 464 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 3868656 is about 1966.8899308299. The cubic root of 3868656 is about 156.9832700201.

The spelling of 3868656 in words is "three million, eight hundred sixty-eight thousand, six hundred fifty-six".