622540 has 24 divisors (see below), whose sum is σ = 1384992. Its totient is φ = 234240.

The previous prime is 622529. The next prime is 622547. The reversal of 622540 is 45226.

It is not an unprimeable number, because it can be changed into a prime (622547) 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, 576 + ... + 1255.

It is an arithmetic number, because the mean of its divisors is an integer number (57708).

2⁶²²⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

622540 is an abundant number, since it is smaller than the sum of its proper divisors (762452).

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

622540 is a wasteful number, since it uses less digits than its factorization.

622540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857 (or 1855 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 622540 is about 789.0120404658. The cubic root of 622540 is about 85.3864754162.

Subtracting from 622540 its sum of digits (19), we obtain a square (622521 = 789²).

Adding to 622540 its reverse (45226), we get a palindrome (667766).

The spelling of 622540 in words is "six hundred twenty-two thousand, five hundred forty".