78222 has 8 divisors (see below), whose sum is σ = 156456. Its totient is φ = 26072.

The previous prime is 78203. The next prime is 78229. The reversal of 78222 is 22287.

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

78222 is an admirable number.

It is a super-2 number, since 2×78222² = 12237362568, which contains 22 as substring.

78222 is a modest number, since divided by 222 gives 78 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78229) by changing a digit.

78222 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6513 + ... + 6524.

It is an arithmetic number, because the mean of its divisors is an integer number (19557).

2⁷⁸²²² is an apocalyptic number.

78222 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.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78228).

78222 is a wasteful number, since it uses less digits than its factorization.

78222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13042.

The product of its digits is 448, while the sum is 21.

The square root of 78222 is about 279.6819622357. The cubic root of 78222 is about 42.7670839007.

It can be divided in two parts, 78 and 222, that added together give a triangular number (300 = T₂₄).

The spelling of 78222 in words is "seventy-eight thousand, two hundred twenty-two".