2781281288 has 16 divisors (see below), whose sum is σ = 5217979500. Its totient is φ = 1389820096.

The previous prime is 2781281227. The next prime is 2781281297. The reversal of 2781281288 is 8821821872.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2119865764 + 661415524 = 46042^2 + 25718^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88043 + ... + 115386.

Almost surely, 2^2781281288 is an apocalyptic number.

It is an amenable number.

2781281288 is a deficient number, since it is larger than the sum of its proper divisors (2436698212).

2781281288 is a wasteful number, since it uses less digits than its factorization.

2781281288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205144 (or 205140 counting only the distinct ones).

The product of its digits is 229376, while the sum is 47.

The square root of 2781281288 is about 52737.8544121772. The cubic root of 2781281288 is about 1406.3118555363.

The spelling of 2781281288 in words is "two billion, seven hundred eighty-one million, two hundred eighty-one thousand, two hundred eighty-eight".