622618 has 8 divisors (see below), whose sum is σ = 939348. Its totient is φ = 309504.

The previous prime is 622613. The next prime is 622619. The reversal of 622618 is 816226.

622618 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in 2 ways, for example, as 619369 + 3249 = 787^2 + 57^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 622592 and 622601.

It is not an unprimeable number, because it can be changed into a prime (622613) by changing a digit.

622618 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421 + ... + 1192.

2⁶²²⁶¹⁸ is an apocalyptic number.

622618 is a deficient number, since it is larger than the sum of its proper divisors (316730).

622618 is a wasteful number, since it uses less digits than its factorization.

622618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808.

The product of its digits is 1152, while the sum is 25.

The square root of 622618 is about 789.0614678211. The cubic root of 622618 is about 85.3900413809.

The spelling of 622618 in words is "six hundred twenty-two thousand, six hundred eighteen".