2784221442 has 18 divisors (see below), whose sum is σ = 6032964873. Its totient is φ = 927999192.

The previous prime is 2784221441. The next prime is 2784221467. The reversal of 2784221442 is 2441224872.

2784221442 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1909777401 + 874444041 = 43701^2 + 29571^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=37311.

It is a junction number, because it is equal to n+sod(n) for n = 2784221397 and 2784221406.

It is not an unprimeable number, because it can be changed into a prime (2784221441) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 217648 + ... + 230084.

Almost surely, 2^2784221442 is an apocalyptic number.

2784221442 is an abundant number, since it is smaller than the sum of its proper divisors (3248743431).

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

2784221442 is an frugal number, since it uses more digits than its factorization.

2784221442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24882 (or 12442 counting only the distinct ones).

The product of its digits is 57344, while the sum is 36.

The square root of 2784221442 is about 52765.7222257025. The cubic root of 2784221442 is about 1406.8072288154.

It can be divided in two parts, 27842 and 21442, that added together give a square (49284 = 222²).

The spelling of 2784221442 in words is "two billion, seven hundred eighty-four million, two hundred twenty-one thousand, four hundred forty-two".