839980840 has 32 divisors (see below), whose sum is σ = 1892429280. Its totient is φ = 335552832.

The previous prime is 839980831. The next prime is 839980847. The reversal of 839980840 is 48089938.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (839980847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18139 + ... + 44821.

It is an arithmetic number, because the mean of its divisors is an integer number (59138415).

Almost surely, 2^839980840 is an apocalyptic number.

It is an amenable number.

839980840 is an abundant number, since it is smaller than the sum of its proper divisors (1052448440).

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

839980840 is a wasteful number, since it uses less digits than its factorization.

839980840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27481 (or 27477 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 839980840 is about 28982.4229490911. The cubic root of 839980840 is about 943.5316221186.

The spelling of 839980840 in words is "eight hundred thirty-nine million, nine hundred eighty thousand, eight hundred forty".