2821381444 has 24 divisors (see below), whose sum is σ = 5644056320. Its totient is φ = 1208886336.

The previous prime is 2821381427. The next prime is 2821381499. The reversal of 2821381444 is 4441831282.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154864 + ... + 172120.

Almost surely, 2^2821381444 is an apocalyptic number.

It is an amenable number.

2821381444 is an abundant number, since it is smaller than the sum of its proper divisors (2822674876).

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

2821381444 is a wasteful number, since it uses less digits than its factorization.

2821381444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23107 (or 23105 counting only the distinct ones).

The product of its digits is 49152, while the sum is 37.

The square root of 2821381444 is about 53116.6776445967. The cubic root of 2821381444 is about 1413.0383058437.

The spelling of 2821381444 in words is "two billion, eight hundred twenty-one million, three hundred eighty-one thousand, four hundred forty-four".