838409830 has 16 divisors (see below), whose sum is σ = 1518752880. Its totient is φ = 333227232.

The previous prime is 838409821. The next prime is 838409837. The reversal of 838409830 is 38904838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838409837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265440 + ... + 268579.

It is an arithmetic number, because the mean of its divisors is an integer number (94922055).

Almost surely, 2^838409830 is an apocalyptic number.

838409830 is a deficient number, since it is larger than the sum of its proper divisors (680343050).

838409830 is a wasteful number, since it uses less digits than its factorization.

838409830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534183.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 838409830 is about 28955.3074582191. The cubic root of 838409830 is about 942.9430282624.

The spelling of 838409830 in words is "eight hundred thirty-eight million, four hundred nine thousand, eight hundred thirty".