687019216 has 40 divisors (see below), whose sum is σ = 1437095520. Its totient is φ = 316288896.

The previous prime is 687019199. The next prime is 687019253. The reversal of 687019216 is 612910786.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83211 + ... + 91093.

It is an arithmetic number, because the mean of its divisors is an integer number (35927388).

Almost surely, 2^687019216 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 687019216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718547760).

687019216 is an abundant number, since it is smaller than the sum of its proper divisors (750076304).

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

687019216 is a wasteful number, since it uses less digits than its factorization.

687019216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8323 (or 8317 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 687019216 is about 26211.0514096631. The cubic root of 687019216 is about 882.3812982789.

The spelling of 687019216 in words is "six hundred eighty-seven million, nineteen thousand, two hundred sixteen".