840230 has 16 divisors (see below), whose sum is σ = 1534464. Its totient is φ = 331200.

The previous prime is 840223. The next prime is 840239. The reversal of 840230 is 32048.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 840199 and 840208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840239) by changing a digit.

840230 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, 155 + ... + 1305.

It is an arithmetic number, because the mean of its divisors is an integer number (95904).

2⁸⁴⁰²³⁰ is an apocalyptic number.

840230 is a deficient number, since it is larger than the sum of its proper divisors (694234).

840230 is a wasteful number, since it uses less digits than its factorization.

840230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 840230 is about 916.6406056901. The cubic root of 840230 is about 94.3624904841.

Adding to 840230 its reverse (32048), we get a palindrome (872278).

The spelling of 840230 in words is "eight hundred forty thousand, two hundred thirty".