839987064 has 128 divisors (see below), whose sum is σ = 2675980800. Its totient is φ = 239155200.

The previous prime is 839987063. The next prime is 839987077. The reversal of 839987064 is 460789938.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 839987064.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (839987063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 523864 + ... + 525464.

It is an arithmetic number, because the mean of its divisors is an integer number (20906100).

Almost surely, 2^839987064 is an apocalyptic number.

839987064 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 839987064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1337990400).

839987064 is an abundant number, since it is smaller than the sum of its proper divisors (1835993736).

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

839987064 is a wasteful number, since it uses less digits than its factorization.

839987064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970 (or 1960 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 839987064 is about 28982.5303243178. The cubic root of 839987064 is about 943.5339525393.

The spelling of 839987064 in words is "eight hundred thirty-nine million, nine hundred eighty-seven thousand, sixty-four".