864222 has 8 divisors (see below), whose sum is σ = 1728456. Its totient is φ = 288072.

The previous prime is 864221. The next prime is 864223. The reversal of 864222 is 222468.

It is an interprime number because it is at equal distance from previous prime (864221) and next prime (864223).

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

864222 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 864192 and 864201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864221) 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, 72013 + ... + 72024.

It is an arithmetic number, because the mean of its divisors is an integer number (216057).

2⁸⁶⁴²²² is an apocalyptic number.

864222 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.

864222 is a wasteful number, since it uses less digits than its factorization.

864222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144042.

The product of its digits is 1536, while the sum is 24.

The square root of 864222 is about 929.6354124064. The cubic root of 864222 is about 95.2522198971.

The spelling of 864222 in words is "eight hundred sixty-four thousand, two hundred twenty-two".