687900 has 36 divisors (see below), whose sum is σ = 1991192. Its totient is φ = 183360.

The previous prime is 687893. The next prime is 687901. The reversal of 687900 is 9786.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687901) by changing a digit.

687900 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 11 ways as a sum of consecutive naturals, for example, 847 + ... + 1446.

2⁶⁸⁷⁹⁰⁰ is an apocalyptic number.

687900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

687900 is an abundant number, since it is smaller than the sum of its proper divisors (1303292).

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

687900 is a wasteful number, since it uses less digits than its factorization.

687900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310 (or 2303 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 687900 is about 829.3973715898. The cubic root of 687900 is about 88.2758219050.

The spelling of 687900 in words is "six hundred eighty-seven thousand, nine hundred".