687341928 has 192 divisors, whose sum is σ = 2179837440. Its totient is φ = 176746752.

The previous prime is 687341911. The next prime is 687341953. The reversal of 687341928 is 829143786.

Its product of digits (580608) is a multiple of the sum of its prime factors (648).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1220575 + ... + 1221137.

It is an arithmetic number, because the mean of its divisors is an integer number (11353320).

Almost surely, 2^687341928 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 687341928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089918720).

687341928 is an abundant number, since it is smaller than the sum of its proper divisors (1492495512).

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

687341928 is a wasteful number, since it uses less digits than its factorization.

687341928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 631 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 687341928 is about 26217.2067162007. The cubic root of 687341928 is about 882.5194363167.

The spelling of 687341928 in words is "six hundred eighty-seven million, three hundred forty-one thousand, nine hundred twenty-eight".