422918 has 8 divisors (see below), whose sum is σ = 640848. Its totient is φ = 209304.

The previous prime is 422911. The next prime is 422923. The reversal of 422918 is 819224.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 422918.

It is not an unprimeable number, because it can be changed into a prime (422911) by changing a digit.

422918 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, 821 + ... + 1232.

It is an arithmetic number, because the mean of its divisors is an integer number (80106).

2⁴²²⁹¹⁸ is an apocalyptic number.

422918 is a deficient number, since it is larger than the sum of its proper divisors (217930).

422918 is a wasteful number, since it uses less digits than its factorization.

422918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158.

The product of its digits is 1152, while the sum is 26.

The square root of 422918 is about 650.3214589724. The cubic root of 422918 is about 75.0617565418.

It can be divided in two parts, 4 and 22918, that added together give a palindrome (22922).

The spelling of 422918 in words is "four hundred twenty-two thousand, nine hundred eighteen".