622543540 has 12 divisors (see below), whose sum is σ = 1307341476. Its totient is φ = 249017408.

The previous prime is 622543513. The next prime is 622543547. The reversal of 622543540 is 45345226.

It can be written as a sum of positive squares in 2 ways, for example, as 494083984 + 128459556 = 22228^2 + 11334^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622543547) 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 3 ways as a sum of consecutive naturals, for example, 15563569 + ... + 15563608.

It is an arithmetic number, because the mean of its divisors is an integer number (108945123).

Almost surely, 2^622543540 is an apocalyptic number.

It is an amenable number.

622543540 is an abundant number, since it is smaller than the sum of its proper divisors (684797936).

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

622543540 is a wasteful number, since it uses less digits than its factorization.

622543540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31127186 (or 31127184 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 622543540 is about 24950.8224313348. The cubic root of 622543540 is about 853.8663726261.

Adding to 622543540 its reverse (45345226), we get a palindrome (667888766).

The spelling of 622543540 in words is "six hundred twenty-two million, five hundred forty-three thousand, five hundred forty".