2781128276 has 12 divisors (see below), whose sum is σ = 4870404672. Its totient is φ = 1389584088.

The previous prime is 2781128269. The next prime is 2781128279. The reversal of 2781128276 is 6728211872.

It is a super-3 number, since 3×2781128276³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781128279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238610 + ... + 249993.

It is an arithmetic number, because the mean of its divisors is an integer number (405867056).

Almost surely, 2^2781128276 is an apocalyptic number.

It is an amenable number.

2781128276 is a deficient number, since it is larger than the sum of its proper divisors (2089276396).

2781128276 is a wasteful number, since it uses less digits than its factorization.

2781128276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490030 (or 490028 counting only the distinct ones).

The product of its digits is 150528, while the sum is 44.

The square root of 2781128276 is about 52736.4037074960. The cubic root of 2781128276 is about 1406.2860656798.

The spelling of 2781128276 in words is "two billion, seven hundred eighty-one million, one hundred twenty-eight thousand, two hundred seventy-six".