838649 has 8 divisors (see below), whose sum is σ = 1000320. Its totient is φ = 687456.

The previous prime is 838633. The next prime is 838657. The reversal of 838649 is 946838.

838649 = T₄₈₆ + T₄₈₇ + ... + T₄₉₂.

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

It is not a de Polignac number, because 838649 - 2⁴ = 838633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (838609) 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, 2444 + ... + 2765.

It is an arithmetic number, because the mean of its divisors is an integer number (125040).

2⁸³⁸⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

838649 is a deficient number, since it is larger than the sum of its proper divisors (161671).

838649 is a wasteful number, since it uses less digits than its factorization.

838649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5239.

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

The square root of 838649 is about 915.7778114805. Note that the first 3 decimals coincide. The cubic root of 838649 is about 94.3032683001.

The spelling of 838649 in words is "eight hundred thirty-eight thousand, six hundred forty-nine".