622072640 has 168 divisors, whose sum is σ = 1745178120. Its totient is φ = 210567168.

The previous prime is 622072631. The next prime is 622072657. The reversal of 622072640 is 46270226.

It can be written as a sum of positive squares in 4 ways, for example, as 164454976 + 457617664 = 12824^2 + 21392^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1520756 + ... + 1521164.

It is an arithmetic number, because the mean of its divisors is an integer number (10387965).

Almost surely, 2^622072640 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 622072640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (872589060).

622072640 is an abundant number, since it is smaller than the sum of its proper divisors (1123105480).

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

622072640 is a wasteful number, since it uses less digits than its factorization.

622072640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 622072640 is about 24941.3840834866. The cubic root of 622072640 is about 853.6510264575.

It can be divided in two parts, 62 and 2072640, that added together give a palindrome (2072702).

The spelling of 622072640 in words is "six hundred twenty-two million, seventy-two thousand, six hundred forty".