622646 has 4 divisors (see below), whose sum is σ = 933972. Its totient is φ = 311322.

The previous prime is 622639. The next prime is 622663. The reversal of 622646 is 646226.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155660 + ... + 155663.

It is an arithmetic number, because the mean of its divisors is an integer number (233493).

2⁶²²⁶⁴⁶ is an apocalyptic number.

622646 is a deficient number, since it is larger than the sum of its proper divisors (311326).

622646 is a wasteful number, since it uses less digits than its factorization.

622646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311325.

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

The square root of 622646 is about 789.0792102191. The cubic root of 622646 is about 85.3913213981.

The spelling of 622646 in words is "six hundred twenty-two thousand, six hundred forty-six".