690224 has 20 divisors (see below), whose sum is σ = 1350360. Its totient is φ = 341760.

The previous prime is 690187. The next prime is 690233. The reversal of 690224 is 422096.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 690224.

It is an unprimeable number.

690224 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 3 ways as a sum of consecutive naturals, for example, 2744 + ... + 2984.

It is an arithmetic number, because the mean of its divisors is an integer number (67518).

2⁶⁹⁰²²⁴ is an apocalyptic number.

It is an amenable number.

690224 is a deficient number, since it is larger than the sum of its proper divisors (660136).

690224 is a wasteful number, since it uses less digits than its factorization.

690224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 690224 is about 830.7972075061. The cubic root of 690224 is about 88.3751204529.

The spelling of 690224 in words is "six hundred ninety thousand, two hundred twenty-four".