622390 has 16 divisors (see below), whose sum is σ = 1132560. Its totient is φ = 246240.

The previous prime is 622367. The next prime is 622397. The reversal of 622390 is 93226.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805 + ... + 1375.

It is an arithmetic number, because the mean of its divisors is an integer number (70785).

2⁶²²³⁹⁰ is an apocalyptic number.

622390 is a deficient number, since it is larger than the sum of its proper divisors (510170).

622390 is a wasteful number, since it uses less digits than its factorization.

622390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 622390 is about 788.9169791556. The cubic root of 622390 is about 85.3796169546.

The spelling of 622390 in words is "six hundred twenty-two thousand, three hundred ninety".