422398 has 4 divisors (see below), whose sum is σ = 633600. Its totient is φ = 211198.

The previous prime is 422393. The next prime is 422407. The reversal of 422398 is 893224.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105598 + ... + 105601.

It is an arithmetic number, because the mean of its divisors is an integer number (158400).

2⁴²²³⁹⁸ is an apocalyptic number.

422398 is a deficient number, since it is larger than the sum of its proper divisors (211202).

422398 is a wasteful number, since it uses less digits than its factorization.

422398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211201.

The product of its digits is 3456, while the sum is 28.

The square root of 422398 is about 649.9215337254. The cubic root of 422398 is about 75.0309797942.

It can be divided in two parts, 422 and 398, that added together give a triangular number (820 = T₄₀).

The spelling of 422398 in words is "four hundred twenty-two thousand, three hundred ninety-eight".