687384483786 has 384 divisors, whose sum is σ = 2107733322240. Its totient is φ = 156115814400.

The previous prime is 687384483781. The next prime is 687384483787.

687384483786 is a `hidden beast` number, since 6 + 8 + 73 + 8 + 4 + 483 + 78 + 6 = 666.

687384483786 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (687384483781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 27681256 + ... + 27706076.

It is an arithmetic number, because the mean of its divisors is an integer number (5488888860).

Almost surely, 2^687384483786 is an apocalyptic number.

687384483786 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 687384483786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053866661120).

687384483786 is an abundant number, since it is smaller than the sum of its proper divisors (1420348838454).

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

687384483786 is a wasteful number, since it uses less digits than its factorization.

687384483786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24942 (or 24939 counting only the distinct ones).

The product of its digits is 1040449536, while the sum is 72.

The spelling of 687384483786 in words is "six hundred eighty-seven billion, three hundred eighty-four million, four hundred eighty-three thousand, seven hundred eighty-six".