649222 has 16 divisors (see below), whose sum is σ = 1128960. Its totient is φ = 274248.

The previous prime is 649217. The next prime is 649261. The reversal of 649222 is 222946.

It is a congruent number.

It is an unprimeable number.

649222 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, 813 + ... + 1399.

It is an arithmetic number, because the mean of its divisors is an integer number (70560).

2⁶⁴⁹²²² is an apocalyptic number.

649222 is a deficient number, since it is larger than the sum of its proper divisors (479738).

649222 is a wasteful number, since it uses less digits than its factorization.

649222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675.

The product of its digits is 1728, while the sum is 25.

The square root of 649222 is about 805.7431352484. The cubic root of 649222 is about 86.5893360169.

The spelling of 649222 in words is "six hundred forty-nine thousand, two hundred twenty-two".