646026 has 8 divisors (see below), whose sum is σ = 1292064. Its totient is φ = 215340.

The previous prime is 646013. The next prime is 646027. The reversal of 646026 is 620646.

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

646026 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 645987 and 646005.

It is not an unprimeable number, because it can be changed into a prime (646027) by changing a digit.

646026 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 3 ways as a sum of consecutive naturals, for example, 53830 + ... + 53841.

It is an arithmetic number, because the mean of its divisors is an integer number (161508).

2⁶⁴⁶⁰²⁶ is an apocalyptic number.

646026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

646026 is a wasteful number, since it uses less digits than its factorization.

646026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107676.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 646026 is about 803.7574260932. The cubic root of 646026 is about 86.4470144502.

The spelling of 646026 in words is "six hundred forty-six thousand, twenty-six".