2781283688 has 32 divisors (see below), whose sum is σ = 5617048800. Its totient is φ = 1286808768.

The previous prime is 2781283679. The next prime is 2781283693. The reversal of 2781283688 is 8863821872.

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, 206231 + ... + 219302.

It is an arithmetic number, because the mean of its divisors is an integer number (175532775).

Almost surely, 2^2781283688 is an apocalyptic number.

It is an amenable number.

2781283688 is an abundant number, since it is smaller than the sum of its proper divisors (2835765112).

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

2781283688 is a wasteful number, since it uses less digits than its factorization.

2781283688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425601 (or 425597 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 53.

The square root of 2781283688 is about 52737.8771662266. The cubic root of 2781283688 is about 1406.3122600438.

The spelling of 2781283688 in words is "two billion, seven hundred eighty-one million, two hundred eighty-three thousand, six hundred eighty-eight".