646622 has 8 divisors (see below), whose sum is σ = 1012176. Its totient is φ = 309232.

The previous prime is 646619. The next prime is 646631. The reversal of 646622 is 226646.

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

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 646591 and 646600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6983 + ... + 7074.

It is an arithmetic number, because the mean of its divisors is an integer number (126522).

2⁶⁴⁶⁶²² is an apocalyptic number.

646622 is a deficient number, since it is larger than the sum of its proper divisors (365554).

646622 is a wasteful number, since it uses less digits than its factorization.

646622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14082.

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

The square root of 646622 is about 804.1280992479. The cubic root of 646622 is about 86.4735905656.

The spelling of 646622 in words is "six hundred forty-six thousand, six hundred twenty-two".