622261440 has 140 divisors (see below), whose sum is σ = 2213585616. Its totient is φ = 165929472.

The previous prime is 622261369. The next prime is 622261441. The reversal of 622261440 is 44162226.

622261440 is a `hidden beast` number, since 6 + 2 + 2 + 2 + 614 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (622261441) 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 19 ways as a sum of consecutive naturals, for example, 13917 + ... + 37923.

Almost surely, 2^622261440 is an apocalyptic number.

622261440 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 622261440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1106792808).

622261440 is an abundant number, since it is smaller than the sum of its proper divisors (1591324176).

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

622261440 is a wasteful number, since it uses less digits than its factorization.

622261440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24036 (or 24017 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 622261440 is about 24945.1686705061. The cubic root of 622261440 is about 853.7373791871.

The spelling of 622261440 in words is "six hundred twenty-two million, two hundred sixty-one thousand, four hundred forty".