842438 has 8 divisors (see below), whose sum is σ = 1269000. Its totient is φ = 419440.

The previous prime is 842423. The next prime is 842447. The reversal of 842438 is 834248.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 842438.

It is a congruent number.

It is an unprimeable number.

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, 188 + ... + 1311.

It is an arithmetic number, because the mean of its divisors is an integer number (158625).

2⁸⁴²⁴³⁸ is an apocalyptic number.

842438 is a deficient number, since it is larger than the sum of its proper divisors (426562).

842438 is a wasteful number, since it uses less digits than its factorization.

842438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782.

The product of its digits is 6144, while the sum is 29.

The square root of 842438 is about 917.8442133609. The cubic root of 842438 is about 94.4450750695.

The spelling of 842438 in words is "eight hundred forty-two thousand, four hundred thirty-eight".