3861616 has 40 divisors (see below), whose sum is σ = 8396784. Its totient is φ = 1704960.

The previous prime is 3861607. The next prime is 3861659. The reversal of 3861616 is 6161683.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 7.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6216 + ... + 6808.

Almost surely, 2^3861616 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 3861616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4198392).

3861616 is an abundant number, since it is smaller than the sum of its proper divisors (4535168).

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

3861616 is a wasteful number, since it uses less digits than its factorization.

3861616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 643 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 3861616 is about 1965.0994885756. The cubic root of 3861616 is about 156.8879885861.

It can be divided in two parts, 386 and 1616, that added together give a palindrome (2002).

The spelling of 3861616 in words is "three million, eight hundred sixty-one thousand, six hundred sixteen".