622658 has 4 divisors (see below), whose sum is σ = 933990. Its totient is φ = 311328.

The previous prime is 622639. The next prime is 622663. The reversal of 622658 is 856226.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 426409 + 196249 = 653^2 + 443^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 622658.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 155663 + ... + 155666.

2⁶²²⁶⁵⁸ is an apocalyptic number.

622658 is a deficient number, since it is larger than the sum of its proper divisors (311332).

622658 is a wasteful number, since it uses less digits than its factorization.

622658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311331.

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

The square root of 622658 is about 789.0868139818. The cubic root of 622658 is about 85.3918699652.

The spelling of 622658 in words is "six hundred twenty-two thousand, six hundred fifty-eight".