687488892 has 24 divisors (see below), whose sum is σ = 1608773376. Its totient is φ = 228501168.

The previous prime is 687488869. The next prime is 687488899. The reversal of 687488892 is 298884786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687488899) 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 7 ways as a sum of consecutive naturals, for example, 78388 + ... + 86715.

It is an arithmetic number, because the mean of its divisors is an integer number (67032224).

Almost surely, 2^687488892 is an apocalyptic number.

It is an amenable number.

687488892 is an abundant number, since it is smaller than the sum of its proper divisors (921284484).

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

687488892 is a wasteful number, since it uses less digits than its factorization.

687488892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165457 (or 165455 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 60.

The square root of 687488892 is about 26220.0093821494. The cubic root of 687488892 is about 882.5823304593.

The spelling of 687488892 in words is "six hundred eighty-seven million, four hundred eighty-eight thousand, eight hundred ninety-two".