423938 has 4 divisors (see below), whose sum is σ = 635910. Its totient is φ = 211968.

The previous prime is 423931. The next prime is 423949. The reversal of 423938 is 839324.

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

It can be written as a sum of positive squares in only one way, i.e., 418609 + 5329 = 647^2 + 73^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 423938.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423931) by changing a digit.

423938 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105983 + ... + 105986.

2⁴²³⁹³⁸ is an apocalyptic number.

423938 is a deficient number, since it is larger than the sum of its proper divisors (211972).

423938 is a wasteful number, since it uses less digits than its factorization.

423938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211971.

The product of its digits is 5184, while the sum is 29.

The square root of 423938 is about 651.1052142319. The cubic root of 423938 is about 75.1220531179.

The spelling of 423938 in words is "four hundred twenty-three thousand, nine hundred thirty-eight".