687632 has 20 divisors (see below), whose sum is σ = 1453776. Its totient is φ = 312480.

The previous prime is 687623. The next prime is 687637. The reversal of 687632 is 236786.

It is not an unprimeable number, because it can be changed into a prime (687637) by changing a digit.

687632 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1778 + ... + 2129.

2⁶⁸⁷⁶³² is an apocalyptic number.

It is an amenable number.

687632 is an abundant number, since it is smaller than the sum of its proper divisors (766144).

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

687632 is a wasteful number, since it uses less digits than its factorization.

687632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3926 (or 3920 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 687632 is about 829.2357927634. The cubic root of 687632 is about 88.2643565790.

The spelling of 687632 in words is "six hundred eighty-seven thousand, six hundred thirty-two".