2865616 has 40 divisors (see below), whose sum is σ = 6249600. Its totient is φ = 1262976.

The previous prime is 2865607. The next prime is 2865617. The reversal of 2865616 is 6165682.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2865617) 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, 4485 + ... + 5083.

It is an arithmetic number, because the mean of its divisors is an integer number (156240).

2^2865616 is an apocalyptic number.

2865616 is a gapful number since it is divisible by the number (26) 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 2865616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3124800).

2865616 is an abundant number, since it is smaller than the sum of its proper divisors (3383984).

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

2865616 is a wasteful number, since it uses less digits than its factorization.

2865616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643 (or 637 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 2865616 is about 1692.8130434280. The cubic root of 2865616 is about 142.0384740025.

It can be divided in two parts, 2865 and 616, that added together give a square (3481 = 59²).

The spelling of 2865616 in words is "two million, eight hundred sixty-five thousand, six hundred sixteen".