2861621322 has 128 divisors (see below), whose sum is σ = 7205345280. Its totient is φ = 739031040.

The previous prime is 2861621299. The next prime is 2861621333. The reversal of 2861621322 is 2231261682.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1960629 + ... + 1962087.

It is an arithmetic number, because the mean of its divisors is an integer number (56291760).

Almost surely, 2^2861621322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2861621322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3602672640).

2861621322 is an abundant number, since it is smaller than the sum of its proper divisors (4343723958).

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

2861621322 is a wasteful number, since it uses less digits than its factorization.

2861621322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596.

The product of its digits is 13824, while the sum is 33.

The square root of 2861621322 is about 53494.1241820071. The cubic root of 2861621322 is about 1419.7244261245.

The spelling of 2861621322 in words is "two billion, eight hundred sixty-one million, six hundred twenty-one thousand, three hundred twenty-two".