622642008 has 64 divisors (see below), whose sum is σ = 1653696000. Its totient is φ = 194804352.

The previous prime is 622642003. The next prime is 622642019. The reversal of 622642008 is 800246226.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622642001) 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 15 ways as a sum of consecutive naturals, for example, 43441 + ... + 55967.

It is an arithmetic number, because the mean of its divisors is an integer number (25839000).

Almost surely, 2^622642008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 622642008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (826848000).

622642008 is an abundant number, since it is smaller than the sum of its proper divisors (1031053992).

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

622642008 is a wasteful number, since it uses less digits than its factorization.

622642008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12664 (or 12660 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 622642008 is about 24952.7955948828. The cubic root of 622642008 is about 853.9113890660.

The spelling of 622642008 in words is "six hundred twenty-two million, six hundred forty-two thousand, eight".