687746312 has 32 divisors (see below), whose sum is σ = 1411391520. Its totient is φ = 311581440.

The previous prime is 687746273. The next prime is 687746327. The reversal of 687746312 is 213647786.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14288 + ... + 39744.

It is an arithmetic number, because the mean of its divisors is an integer number (44105985).

Almost surely, 2^687746312 is an apocalyptic number.

It is an amenable number.

687746312 is an abundant number, since it is smaller than the sum of its proper divisors (723645208).

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

687746312 is a wasteful number, since it uses less digits than its factorization.

687746312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25781 (or 25777 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 687746312 is about 26224.9177691752. The cubic root of 687746312 is about 882.6924733264.

The spelling of 687746312 in words is "six hundred eighty-seven million, seven hundred forty-six thousand, three hundred twelve".