622660440 has 128 divisors (see below), whose sum is σ = 1924715520. Its totient is φ = 161049600.

The previous prime is 622660433. The next prime is 622660447. The reversal of 622660440 is 44066226.

It is an interprime number because it is at equal distance from previous prime (622660433) and next prime (622660447).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 622660398 and 622660407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622660447) 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 31 ways as a sum of consecutive naturals, for example, 1333087 + ... + 1333553.

It is an arithmetic number, because the mean of its divisors is an integer number (15036840).

Almost surely, 2^622660440 is an apocalyptic number.

622660440 is a gapful number since it is divisible by the number (60) 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 622660440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (962357760).

622660440 is an abundant number, since it is smaller than the sum of its proper divisors (1302055080).

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

622660440 is a wasteful number, since it uses less digits than its factorization.

622660440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 622660440 is about 24953.1649295235. The cubic root of 622660440 is about 853.9198150632.

It can be divided in two parts, 6226 and 60440, that added together give a palindrome (66666).

The spelling of 622660440 in words is "six hundred twenty-two million, six hundred sixty thousand, four hundred forty".