622985 has 16 divisors (see below), whose sum is σ = 836352. Its totient is φ = 441600.

The previous prime is 622967. The next prime is 622987. The reversal of 622985 is 589226.

622985 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 622985 - 2⁸ = 622729 is a prime.

It is a super-2 number, since 2×622985² = 776220620450, which contains 22 as substring.

It is a Curzon number.

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

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 15 ways as a sum of consecutive naturals, for example, 2465 + ... + 2705.

It is an arithmetic number, because the mean of its divisors is an integer number (52272).

2⁶²²⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

622985 is a deficient number, since it is larger than the sum of its proper divisors (213367).

622985 is a wasteful number, since it uses less digits than its factorization.

622985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304.

The product of its digits is 8640, while the sum is 32.

The square root of 622985 is about 789.2939883212. The cubic root of 622985 is about 85.4068157058.

The spelling of 622985 in words is "six hundred twenty-two thousand, nine hundred eighty-five".