687008380 has 12 divisors (see below), whose sum is σ = 1442717640. Its totient is φ = 274803344.

The previous prime is 687008351. The next prime is 687008381. The reversal of 687008380 is 83800786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687008381) 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 3 ways as a sum of consecutive naturals, for example, 17175190 + ... + 17175229.

It is an arithmetic number, because the mean of its divisors is an integer number (120226470).

Almost surely, 2^687008380 is an apocalyptic number.

It is an amenable number.

687008380 is an abundant number, since it is smaller than the sum of its proper divisors (755709260).

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

687008380 is a wasteful number, since it uses less digits than its factorization.

687008380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34350428 (or 34350426 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 687008380 is about 26210.8447021457. The cubic root of 687008380 is about 882.3766591394.

The spelling of 687008380 in words is "six hundred eighty-seven million, eight thousand, three hundred eighty".