864422 has 8 divisors (see below), whose sum is σ = 1396416. Its totient is φ = 398952.

The previous prime is 864419. The next prime is 864427. The reversal of 864422 is 224468.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 33247 = 864422 / (8 + 6 + 4 + 4 + 2 + 2).

It is a plaindrome in base 9.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 864391 and 864400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864427) 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, 16598 + ... + 16649.

It is an arithmetic number, because the mean of its divisors is an integer number (174552).

2⁸⁶⁴⁴²² is an apocalyptic number.

864422 is a deficient number, since it is larger than the sum of its proper divisors (531994).

864422 is a wasteful number, since it uses less digits than its factorization.

864422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33262.

The product of its digits is 3072, while the sum is 26.

The square root of 864422 is about 929.7429752356. The cubic root of 864422 is about 95.2595671507.

The spelling of 864422 in words is "eight hundred sixty-four thousand, four hundred twenty-two".