690680 has 32 divisors (see below), whose sum is σ = 1607040. Its totient is φ = 266880.

The previous prime is 690673. The next prime is 690689. The reversal of 690680 is 86096.

690680 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 (690689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 962 + ... + 1518.

It is an arithmetic number, because the mean of its divisors is an integer number (50220).

2⁶⁹⁰⁶⁸⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803520).

690680 is an abundant number, since it is smaller than the sum of its proper divisors (916360).

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

690680 is a wasteful number, since it uses less digits than its factorization.

690680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599 (or 595 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 690680 is about 831.0715973970. The cubic root of 690680 is about 88.3945779930.

The spelling of 690680 in words is "six hundred ninety thousand, six hundred eighty".