690338 has 8 divisors (see below), whose sum is σ = 1129680. Its totient is φ = 313780.

The previous prime is 690323. The next prime is 690341. The reversal of 690338 is 833096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 690338.

It is an unprimeable number.

690338 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 15668 + ... + 15711.

It is an arithmetic number, because the mean of its divisors is an integer number (141210).

2⁶⁹⁰³³⁸ is an apocalyptic number.

690338 is a deficient number, since it is larger than the sum of its proper divisors (439342).

690338 is a wasteful number, since it uses less digits than its factorization.

690338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31392.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 690338 is about 830.8658134741. The cubic root of 690338 is about 88.3799856411.

The spelling of 690338 in words is "six hundred ninety thousand, three hundred thirty-eight".