838643 has 8 divisors (see below), whose sum is σ = 932736. Its totient is φ = 748800.

The previous prime is 838633. The next prime is 838657. The reversal of 838643 is 346838.

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

It is not a de Polignac number, because 838643 - 2¹⁰ = 837619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (838613) 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 in 7 ways as a sum of consecutive naturals, for example, 638 + ... + 1443.

It is an arithmetic number, because the mean of its divisors is an integer number (116592).

2⁸³⁸⁶⁴³ is an apocalyptic number.

838643 is a deficient number, since it is larger than the sum of its proper divisors (94093).

838643 is a wasteful number, since it uses less digits than its factorization.

838643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125.

The product of its digits is 13824, while the sum is 32.

The square root of 838643 is about 915.7745355708. The cubic root of 838643 is about 94.3030434063.

The spelling of 838643 in words is "eight hundred thirty-eight thousand, six hundred forty-three".