2187868 has 6 divisors (see below), whose sum is σ = 3828776. Its totient is φ = 1093932.

The previous prime is 2187863. The next prime is 2187877. The reversal of 2187868 is 8687812.

It is a self number, because there is not a number n which added to its sum of digits gives 2187868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273480 + ... + 273487.

2^2187868 is an apocalyptic number.

It is an amenable number.

2187868 is a deficient number, since it is larger than the sum of its proper divisors (1640908).

2187868 is a wasteful number, since it uses less digits than its factorization.

2187868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546971 (or 546969 counting only the distinct ones).

The product of its digits is 43008, while the sum is 40.

The square root of 2187868 is about 1479.1443472494. The cubic root of 2187868 is about 129.8196315203.

The spelling of 2187868 in words is "two million, one hundred eighty-seven thousand, eight hundred sixty-eight".