2178088420 has 12 divisors (see below), whose sum is σ = 4573985724. Its totient is φ = 871235360.

The previous prime is 2178088391. The next prime is 2178088421. The reversal of 2178088420 is 248808712.

It can be written as a sum of positive squares in 2 ways, for example, as 368947264 + 1809141156 = 19208^2 + 42534^2 .

It is not an unprimeable number, because it can be changed into a prime (2178088421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54452191 + ... + 54452230.

It is an arithmetic number, because the mean of its divisors is an integer number (381165477).

Almost surely, 2^2178088420 is an apocalyptic number.

2178088420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2178088420 is an abundant number, since it is smaller than the sum of its proper divisors (2395897304).

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

2178088420 is a wasteful number, since it uses less digits than its factorization.

2178088420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108904430 (or 108904428 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 2178088420 is about 46669.9948575099. The cubic root of 2178088420 is about 1296.2591510733.

The spelling of 2178088420 in words is "two billion, one hundred seventy-eight million, eighty-eight thousand, four hundred twenty".