1872222 has 32 divisors (see below), whose sum is σ = 4302720. Its totient is φ = 537120.

The previous prime is 1872217. The next prime is 1872229. The reversal of 1872222 is 2222781.

It is a happy number.

It is a d-powerful number, because it can be written as 1 + 8² + 7⁷ + 2 + 2² + 2⁵ + 2²⁰ .

It is a junction number, because it is equal to n+sod(n) for n = 1872192 and 1872201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1872229) 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 15 ways as a sum of consecutive naturals, for example, 508 + ... + 2000.

It is an arithmetic number, because the mean of its divisors is an integer number (134460).

2^1872222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1872222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2151360).

1872222 is an abundant number, since it is smaller than the sum of its proper divisors (2430498).

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

1872222 is a wasteful number, since it uses less digits than its factorization.

1872222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528.

The product of its digits is 896, while the sum is 24.

The square root of 1872222 is about 1368.2916355807. The cubic root of 1872222 is about 123.2496746189.

It can be divided in two parts, 187 and 2222, that multiplied together give a palindrome (415514).

The spelling of 1872222 in words is "one million, eight hundred seventy-two thousand, two hundred twenty-two".