622638280 has 64 divisors (see below), whose sum is σ = 1563883200. Its totient is φ = 221141760.

The previous prime is 622638271. The next prime is 622638283. The reversal of 622638280 is 82836226.

It is not an unprimeable number, because it can be changed into a prime (622638283) 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, 2466 + ... + 35374.

It is an arithmetic number, because the mean of its divisors is an integer number (24435675).

Almost surely, 2^622638280 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 622638280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781941600).

622638280 is an abundant number, since it is smaller than the sum of its proper divisors (941244920).

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

622638280 is a wasteful number, since it uses less digits than its factorization.

622638280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32974 (or 32970 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 622638280 is about 24952.7208937222. The cubic root of 622638280 is about 853.9096848293.

The spelling of 622638280 in words is "six hundred twenty-two million, six hundred thirty-eight thousand, two hundred eighty".