422864 has 40 divisors (see below), whose sum is σ = 937440. Its totient is φ = 183168.

The previous prime is 422861. The next prime is 422867. The reversal of 422864 is 468224.

It is an interprime number because it is at equal distance from previous prime (422861) and next prime (422867).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3899 + ... + 4005.

It is an arithmetic number, because the mean of its divisors is an integer number (23436).

2⁴²²⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (468720).

422864 is an abundant number, since it is smaller than the sum of its proper divisors (514576).

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

422864 is a wasteful number, since it uses less digits than its factorization.

422864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 141 counting only the distinct ones).

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

The square root of 422864 is about 650.2799397183. The cubic root of 422864 is about 75.0585616693.

The spelling of 422864 in words is "four hundred twenty-two thousand, eight hundred sixty-four".