7812222 has 32 divisors (see below), whose sum is σ = 17466624. Its totient is φ = 2308800.

The previous prime is 7812221. The next prime is 7812227. The reversal of 7812222 is 2222187.

It is a happy number.

It is a super-2 number, since 2×7812222² = 122061625154568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7812192 and 7812201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7812221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1263 + ... + 4149.

It is an arithmetic number, because the mean of its divisors is an integer number (545832).

Almost surely, 2^7812222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7812222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8733312).

7812222 is an abundant number, since it is smaller than the sum of its proper divisors (9654402).

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

7812222 is a wasteful number, since it uses less digits than its factorization.

7812222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944.

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

The square root of 7812222 is about 2795.0352412805. The cubic root of 7812222 is about 198.4227778815.

It can be divided in two parts, 781 and 2222, that added together give a palindrome (3003).

The spelling of 7812222 in words is "seven million, eight hundred twelve thousand, two hundred twenty-two".