422538 has 8 divisors (see below), whose sum is σ = 845088. Its totient is φ = 140844.

The previous prime is 422537. The next prime is 422549. The reversal of 422538 is 835224.

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

422538 is an admirable number.

It is a super-2 number, since 2×422538² = 357076722888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (422537) 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, 35206 + ... + 35217.

It is an arithmetic number, because the mean of its divisors is an integer number (105636).

2⁴²²⁵³⁸ is an apocalyptic number.

422538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

422538 is a wasteful number, since it uses less digits than its factorization.

422538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70428.

The product of its digits is 1920, while the sum is 24.

The square root of 422538 is about 650.0292301120. The cubic root of 422538 is about 75.0392683253.

Subtracting 422538 from its reverse (835224), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 422538 in words is "four hundred twenty-two thousand, five hundred thirty-eight".