2622256640 has 40 divisors (see below), whose sum is σ = 6287276160. Its totient is φ = 1048901632.

The previous prime is 2622256621. The next prime is 2622256661. The reversal of 2622256640 is 466522262.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 2622256640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509600 + ... + 514719.

It is an arithmetic number, because the mean of its divisors is an integer number (157181904).

Almost surely, 2^2622256640 is an apocalyptic number.

2622256640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2622256640 is an abundant number, since it is smaller than the sum of its proper divisors (3665019520).

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

2622256640 is an equidigital number, since it uses as much as digits as its factorization.

2622256640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024342 (or 1024326 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 2622256640 is about 51207.9743789969. The cubic root of 2622256640 is about 1378.9813668938.

The spelling of 2622256640 in words is "two billion, six hundred twenty-two million, two hundred fifty-six thousand, six hundred forty".