2581368 has 32 divisors (see below), whose sum is σ = 6566400. Its totient is φ = 845408.

The previous prime is 2581367. The next prime is 2581373. The reversal of 2581368 is 8631852.

It is a happy number.

It is a hoax number, since the sum of its digits (33) 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 (2581367) 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, 505 + ... + 2327.

It is an arithmetic number, because the mean of its divisors is an integer number (205200).

2^2581368 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 2581368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3283200).

2581368 is an abundant number, since it is smaller than the sum of its proper divisors (3985032).

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

2581368 is a wasteful number, since it uses less digits than its factorization.

2581368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891 (or 1887 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 2581368 is about 1606.6636237869. The cubic root of 2581368 is about 137.1776337897.

The spelling of 2581368 in words is "two million, five hundred eighty-one thousand, three hundred sixty-eight".