2868558 has 48 divisors (see below), whose sum is σ = 7288704. Its totient is φ = 744240.

The previous prime is 2868557. The next prime is 2868571. The reversal of 2868558 is 8558682.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a d-powerful number, because it can be written as 2 + 8³ + 6 + 8⁶ + 5⁸ + 5⁹ + 8⁶ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2868557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2791 + ... + 3677.

It is an arithmetic number, because the mean of its divisors is an integer number (151848).

2^2868558 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2868558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3644352).

2868558 is an abundant number, since it is smaller than the sum of its proper divisors (4420146).

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

2868558 is a wasteful number, since it uses less digits than its factorization.

2868558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917 (or 910 counting only the distinct ones).

The product of its digits is 153600, while the sum is 42.

The square root of 2868558 is about 1693.6817882944. The cubic root of 2868558 is about 142.0870655638.

It can be divided in two parts, 28 and 68558, that added together give a palindrome (68586).

The spelling of 2868558 in words is "two million, eight hundred sixty-eight thousand, five hundred fifty-eight".