839868920 has 128 divisors (see below), whose sum is σ = 2210250240. Its totient is φ = 284106240.

The previous prime is 839868893. The next prime is 839868941. The reversal of 839868920 is 29868938.

839868920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 373319 + ... + 375561.

It is an arithmetic number, because the mean of its divisors is an integer number (17267580).

Almost surely, 2^839868920 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 839868920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1105125120).

839868920 is an abundant number, since it is smaller than the sum of its proper divisors (1370381320).

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

839868920 is a wasteful number, since it uses less digits than its factorization.

839868920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325 (or 2321 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 53.

The square root of 839868920 is about 28980.4920593147. The cubic root of 839868920 is about 943.4897145160.

The spelling of 839868920 in words is "eight hundred thirty-nine million, eight hundred sixty-eight thousand, nine hundred twenty".