646226 has 16 divisors (see below), whose sum is σ = 1144320. Its totient is φ = 267840.

The previous prime is 646199. The next prime is 646237. The reversal of 646226 is 622646.

646226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 646195 and 646204.

It is an unprimeable number.

646226 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, 311 + ... + 1178.

It is an arithmetic number, because the mean of its divisors is an integer number (71520).

2⁶⁴⁶²²⁶ is an apocalyptic number.

646226 is a deficient number, since it is larger than the sum of its proper divisors (498094).

646226 is a wasteful number, since it uses less digits than its factorization.

646226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529.

The product of its digits is 3456, while the sum is 26.

The square root of 646226 is about 803.8818321122. The cubic root of 646226 is about 86.4559344313.

The spelling of 646226 in words is "six hundred forty-six thousand, two hundred twenty-six".