2730878181 has 24 divisors (see below), whose sum is σ = 4181350680. Its totient is φ = 1711558656.

The previous prime is 2730878173. The next prime is 2730878191. The reversal of 2730878181 is 1818780372.

2730878181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 665175681 + 2065702500 = 25791^2 + 45450^2 .

It is not a de Polignac number, because 2730878181 - 2³ = 2730878173 is a prime.

It is a super-2 number, since 2×2730878181² = 14915391278923737522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2730878191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132531 + ... + 151743.

It is an arithmetic number, because the mean of its divisors is an integer number (174222945).

Almost surely, 2^2730878181 is an apocalyptic number.

It is an amenable number.

2730878181 is a deficient number, since it is larger than the sum of its proper divisors (1450472499).

2730878181 is a wasteful number, since it uses less digits than its factorization.

2730878181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20165 (or 20162 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 2730878181 is about 52257.8049768645. The cubic root of 2730878181 is about 1397.7648314724.

The spelling of 2730878181 in words is "two billion, seven hundred thirty million, eight hundred seventy-eight thousand, one hundred eighty-one".