2731128380 has 24 divisors (see below), whose sum is σ = 5750761632. Its totient is φ = 1089519552.

The previous prime is 2731128377. The next prime is 2731128409. The reversal of 2731128380 is 838211372.

2731128380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2731128380.

It is a congruent number.

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, 175592 + ... + 190511.

It is an arithmetic number, because the mean of its divisors is an integer number (239615068).

Almost surely, 2^2731128380 is an apocalyptic number.

2731128380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2731128380 is an abundant number, since it is smaller than the sum of its proper divisors (3019633252).

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

2731128380 is a wasteful number, since it uses less digits than its factorization.

2731128380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366485 (or 366483 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 2731128380 is about 52260.1988132460. The cubic root of 2731128380 is about 1397.8075172143.

The spelling of 2731128380 in words is "two billion, seven hundred thirty-one million, one hundred twenty-eight thousand, three hundred eighty".