622722648 has 128 divisors (see below), whose sum is σ = 1697034240. Its totient is φ = 189696000.

The previous prime is 622722647. The next prime is 622722649. The reversal of 622722648 is 846227226.

It is an interprime number because it is at equal distance from previous prime (622722647) and next prime (622722649).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622722647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3260233 + ... + 3260423.

It is an arithmetic number, because the mean of its divisors is an integer number (13258080).

Almost surely, 2^622722648 is an apocalyptic number.

622722648 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 622722648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (848517120).

622722648 is an abundant number, since it is smaller than the sum of its proper divisors (1074311592).

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

622722648 is a wasteful number, since it uses less digits than its factorization.

622722648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 405 counting only the distinct ones).

The product of its digits is 129024, while the sum is 39.

The square root of 622722648 is about 24954.4113935793. The cubic root of 622722648 is about 853.9482515761.

The spelling of 622722648 in words is "six hundred twenty-two million, seven hundred twenty-two thousand, six hundred forty-eight".