622856 has 32 divisors (see below), whose sum is σ = 1292760. Its totient is φ = 279552.

The previous prime is 622849. The next prime is 622861. The reversal of 622856 is 658226.

622856 = T₅₁ + T₅₂ + ... + T₁₅₆.

It can be written as a sum of positive squares in 4 ways, for example, as 302500 + 320356 = 550^2 + 566^2 .

It is an unprimeable number.

622856 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 (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5456 + ... + 5568.

2⁶²²⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 622856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (646380).

622856 is an abundant number, since it is smaller than the sum of its proper divisors (669904).

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

622856 is a wasteful number, since it uses less digits than its factorization.

622856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 181 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 622856 is about 789.2122654901. The cubic root of 622856 is about 85.4009203045.

The spelling of 622856 in words is "six hundred twenty-two thousand, eight hundred fifty-six".