838640208 has 80 divisors (see below), whose sum is σ = 2480702336. Its totient is φ = 239155200.

The previous prime is 838640207. The next prime is 838640233. The reversal of 838640208 is 802046838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838640207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199860 + ... + 204012.

Almost surely, 2^838640208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 838640208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1240351168).

838640208 is an abundant number, since it is smaller than the sum of its proper divisors (1642062128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

838640208 is a wasteful number, since it uses less digits than its factorization.

838640208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4772 (or 4766 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 838640208 is about 28959.2853502983. The cubic root of 838640208 is about 943.0293875532.

The spelling of 838640208 in words is "eight hundred thirty-eight million, six hundred forty thousand, two hundred eight".