2621226440 has 64 divisors (see below), whose sum is σ = 6760540800. Its totient is φ = 896007168.

The previous prime is 2621226371. The next prime is 2621226449. The reversal of 2621226440 is 446221262.

It is a super-3 number, since 3×2621226440³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2621226449) 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 15 ways as a sum of consecutive naturals, for example, 80471 + ... + 108249.

It is an arithmetic number, because the mean of its divisors is an integer number (105633450).

Almost surely, 2^2621226440 is an apocalyptic number.

2621226440 is a gapful number since it is divisible by the number (20) 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 2621226440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3380270400).

2621226440 is an abundant number, since it is smaller than the sum of its proper divisors (4139314360).

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

2621226440 is a wasteful number, since it uses less digits than its factorization.

2621226440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28134 (or 28130 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 2621226440 is about 51197.9144106476. The cubic root of 2621226440 is about 1378.8007574824.

The spelling of 2621226440 in words is "two billion, six hundred twenty-one million, two hundred twenty-six thousand, four hundred forty".