422378 has 16 divisors (see below), whose sum is σ = 703296. Its totient is φ = 188640.

The previous prime is 422377. The next prime is 422393. The reversal of 422378 is 873224.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 422378.

It is not an unprimeable number, because it can be changed into a prime (422377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1475 + ... + 1737.

It is an arithmetic number, because the mean of its divisors is an integer number (43956).

2⁴²²³⁷⁸ is an apocalyptic number.

422378 is a deficient number, since it is larger than the sum of its proper divisors (280918).

422378 is a wasteful number, since it uses less digits than its factorization.

422378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349.

The product of its digits is 2688, while the sum is 26.

The square root of 422378 is about 649.9061470705. The cubic root of 422378 is about 75.0297955688.

The spelling of 422378 in words is "four hundred twenty-two thousand, three hundred seventy-eight".