690340 has 24 divisors (see below), whose sum is σ = 1657152. Its totient is φ = 236640.

The previous prime is 690323. The next prime is 690341. The reversal of 690340 is 43096.

690340 is nontrivially palindromic in base 13.

It is not an unprimeable number, because it can be changed into a prime (690341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2326 + ... + 2605.

It is an arithmetic number, because the mean of its divisors is an integer number (69048).

2⁶⁹⁰³⁴⁰ is an apocalyptic number.

It is an amenable number.

690340 is an abundant number, since it is smaller than the sum of its proper divisors (966812).

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

690340 is a wasteful number, since it uses less digits than its factorization.

690340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4947 (or 4945 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 690340 is about 830.8670170370. The cubic root of 690340 is about 88.3800709905.

The spelling of 690340 in words is "six hundred ninety thousand, three hundred forty".