2168378 has 8 divisors (see below), whose sum is σ = 3259872. Its totient is φ = 1081756.

The previous prime is 2168377. The next prime is 2168399. The reversal of 2168378 is 8738612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2168377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251 + ... + 2097.

It is an arithmetic number, because the mean of its divisors is an integer number (407484).

2^2168378 is an apocalyptic number.

2168378 is a deficient number, since it is larger than the sum of its proper divisors (1091494).

2168378 is a wasteful number, since it uses less digits than its factorization.

2168378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436.

The product of its digits is 16128, while the sum is 35.

The square root of 2168378 is about 1472.5413406760. The cubic root of 2168378 is about 129.4329940622.

The spelling of 2168378 in words is "two million, one hundred sixty-eight thousand, three hundred seventy-eight".