2788362285921 has 9 divisors (see below), whose sum is σ = 4027641648979. Its totient is φ = 1858904850936.

The previous prime is 2788362285901. The next prime is 2788362285949. The reversal of 2788362285921 is 1295822638872.

It is a happy number.

The square root of 2788362285921 is 1669839.

It is a perfect power (a square), and thus also a powerful number.

2788362285921 is a `hidden beast` number, since 2 + 7 + 8 + 8 + 36 + 2 + 2 + 8 + 592 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1097748630225 + 1690613655696 = 1047735^2 + 1300236^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2788362285921 - 2⁹ = 2788362285409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2788362285901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4731211 + ... + 5287823.

Almost surely, 2^{2788362285921} is an apocalyptic number.

2788362285921 is the 1669839-th square number.

2788362285921 is the 834920-th centered octagonal number.

It is an amenable number.

2788362285921 is a deficient number, since it is larger than the sum of its proper divisors (1239279363058).

2788362285921 is an frugal number, since it uses more digits than its factorization.

2788362285921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113232 (or 556616 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 2788362285921 in words is "two trillion, seven hundred eighty-eight billion, three hundred sixty-two million, two hundred eighty-five thousand, nine hundred twenty-one".