2722020640 has 96 divisors (see below), whose sum is σ = 6582870000. Its totient is φ = 1063256064.

The previous prime is 2722020611. The next prime is 2722020659. The reversal of 2722020640 is 460202272.

It can be written as a sum of positive squares in 8 ways, for example, as 2191363344 + 530657296 = 46812^2 + 23036^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2178736 + ... + 2179984.

Almost surely, 2^2722020640 is an apocalyptic number.

2722020640 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 2722020640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3291435000).

2722020640 is an abundant number, since it is smaller than the sum of its proper divisors (3860849360).

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

2722020640 is a wasteful number, since it uses less digits than its factorization.

2722020640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574 (or 1566 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 2722020640 is about 52172.9876468657. The cubic root of 2722020640 is about 1396.2519885670.

The spelling of 2722020640 in words is "two billion, seven hundred twenty-two million, twenty thousand, six hundred forty".