687622 has 16 divisors (see below), whose sum is σ = 1134000. Its totient is φ = 310752.

The previous prime is 687593. The next prime is 687623. The reversal of 687622 is 226786.

It is a happy number.

687622 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687623) by changing a digit.

687622 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 7 ways as a sum of consecutive naturals, for example, 1129 + ... + 1627.

It is an arithmetic number, because the mean of its divisors is an integer number (70875).

2⁶⁸⁷⁶²² is an apocalyptic number.

687622 is a deficient number, since it is larger than the sum of its proper divisors (446378).

687622 is a wasteful number, since it uses less digits than its factorization.

687622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567.

The product of its digits is 8064, while the sum is 31.

The square root of 687622 is about 829.2297630934. The cubic root of 687622 is about 88.2639287107.

The spelling of 687622 in words is "six hundred eighty-seven thousand, six hundred twenty-two".