622986 has 48 divisors (see below), whose sum is σ = 1570464. Its totient is φ = 163296.

The previous prime is 622967. The next prime is 622987. The reversal of 622986 is 689226.

It is a super-2 number, since 2×622986² = 776223112392, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (622987) by changing a digit.

622986 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 (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3741 + ... + 3903.

It is an arithmetic number, because the mean of its divisors is an integer number (32718).

2⁶²²⁹⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 622986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (785232).

622986 is an abundant number, since it is smaller than the sum of its proper divisors (947478).

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

622986 is a wasteful number, since it uses less digits than its factorization.

622986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 188 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 622986 is about 789.2946217985. The cubic root of 622986 is about 85.4068614034.

The spelling of 622986 in words is "six hundred twenty-two thousand, nine hundred eighty-six".