1878222 has 8 divisors (see below), whose sum is σ = 3756456. Its totient is φ = 626072.

The previous prime is 1878221. The next prime is 1878223. The reversal of 1878222 is 2228781.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1878221) and next prime (1878223).

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

1878222 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1878222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1878221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156513 + ... + 156524.

It is an arithmetic number, because the mean of its divisors is an integer number (469557).

2^1878222 is an apocalyptic number.

1878222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1878222 is a wasteful number, since it uses less digits than its factorization.

1878222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313042.

The product of its digits is 3584, while the sum is 30.

The square root of 1878222 is about 1370.4823968224. The cubic root of 1878222 is about 123.3811956107.

The spelling of 1878222 in words is "one million, eight hundred seventy-eight thousand, two hundred twenty-two".