646230 has 32 divisors (see below), whose sum is σ = 1671264. Its totient is φ = 158976.

The previous prime is 646199. The next prime is 646237. The reversal of 646230 is 32646.

It is a super-2 number, since 2×646230² = 835226425800, which contains 22 as substring.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 646197 and 646206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646237) by changing a digit.

646230 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439 + ... + 1218.

It is an arithmetic number, because the mean of its divisors is an integer number (52227).

2⁶⁴⁶²³⁰ is an apocalyptic number.

646230 is an abundant number, since it is smaller than the sum of its proper divisors (1025034).

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

646230 is a wasteful number, since it uses less digits than its factorization.

646230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 646230 is about 803.8843200362. The cubic root of 646230 is about 86.4561128121.

Adding to 646230 its reverse (32646), we get a palindrome (678876).

The spelling of 646230 in words is "six hundred forty-six thousand, two hundred thirty".