2861568 has 120 divisors (see below), whose sum is σ = 8936928. Its totient is φ = 912384.

The previous prime is 2861561. The next prime is 2861569. The reversal of 2861568 is 8651682.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2861561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124405 + ... + 124427.

2^2861568 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 2861568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4468464).

2861568 is an abundant number, since it is smaller than the sum of its proper divisors (6075360).

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

2861568 is an frugal number, since it uses more digits than its factorization.

2861568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 28 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 2861568 is about 1691.6169779238. The cubic root of 2861568 is about 141.9715607928.

The spelling of 2861568 in words is "two million, eight hundred sixty-one thousand, five hundred sixty-eight".