2381868 has 36 divisors (see below), whose sum is σ = 6086080. Its totient is φ = 785376.

The previous prime is 2381861. The next prime is 2381879. The reversal of 2381868 is 8681832.

2381868 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (2381861) 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, 3621 + ... + 4227.

2^2381868 is an apocalyptic number.

It is an amenable number.

2381868 is an abundant number, since it is smaller than the sum of its proper divisors (3704212).

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

2381868 is a wasteful number, since it uses less digits than its factorization.

2381868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 721 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 2381868 is about 1543.3301655835. The cubic root of 2381868 is about 133.5485662628.

Subtracting from 2381868 its sum of digits (36), we obtain a palindrome (2381832).

It can be divided in two parts, 2381 and 868, that added together give a square (3249 = 57²).

The spelling of 2381868 in words is "two million, three hundred eighty-one thousand, eight hundred sixty-eight".