849638 has 4 divisors (see below), whose sum is σ = 1274460. Its totient is φ = 424818.

The previous prime is 849601. The next prime is 849649. The reversal of 849638 is 836948.

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

It is a congruent number.

It is an unprimeable number.

849638 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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212408 + ... + 212411.

It is an arithmetic number, because the mean of its divisors is an integer number (318615).

2⁸⁴⁹⁶³⁸ is an apocalyptic number.

849638 is a deficient number, since it is larger than the sum of its proper divisors (424822).

849638 is a wasteful number, since it uses less digits than its factorization.

849638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424821.

The product of its digits is 41472, while the sum is 38.

The square root of 849638 is about 921.7581027580. The cubic root of 849638 is about 94.7133743149.

The spelling of 849638 in words is "eight hundred forty-nine thousand, six hundred thirty-eight".