687950556 has 24 divisors (see below), whose sum is σ = 1689703680. Its totient is φ = 217247472.

The previous prime is 687950551. The next prime is 687950597. The reversal of 687950556 is 655059786.

It is a junction number, because it is equal to n+sod(n) for n = 687950499 and 687950508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687950551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1508436 + ... + 1508891.

It is an arithmetic number, because the mean of its divisors is an integer number (70404320).

Almost surely, 2^687950556 is an apocalyptic number.

It is an amenable number.

687950556 is an abundant number, since it is smaller than the sum of its proper divisors (1001753124).

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

687950556 is a wasteful number, since it uses less digits than its factorization.

687950556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017353 (or 3017351 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 51.

The square root of 687950556 is about 26228.8115628596. The cubic root of 687950556 is about 882.7798441076.

The spelling of 687950556 in words is "six hundred eighty-seven million, nine hundred fifty thousand, five hundred fifty-six".