4238639 has 4 divisors (see below), whose sum is σ = 4337256. Its totient is φ = 4140024.

The previous prime is 4238617. The next prime is 4238651. The reversal of 4238639 is 9368324.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4238639 is a prime.

It is a super-3 number, since 3×4238639³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

It is a d-powerful number, because it can be written as 4¹⁰ + 2⁵ + 3¹³ + 8 + 6⁴ + 3¹³ + 9² .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4238599 and 4238608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4238699) 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 3 ways as a sum of consecutive naturals, for example, 49244 + ... + 49329.

It is an arithmetic number, because the mean of its divisors is an integer number (1084314).

Almost surely, 2^4238639 is an apocalyptic number.

4238639 is a deficient number, since it is larger than the sum of its proper divisors (98617).

4238639 is an equidigital number, since it uses as much as digits as its factorization.

4238639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98616.

The product of its digits is 31104, while the sum is 35.

The square root of 4238639 is about 2058.7955216582. The cubic root of 4238639 is about 161.8361270282.

The spelling of 4238639 in words is "four million, two hundred thirty-eight thousand, six hundred thirty-nine".