2178383812 has 24 divisors (see below), whose sum is σ = 4193112672. Its totient is φ = 990172040.

The previous prime is 2178383803. The next prime is 2178383813. The reversal of 2178383812 is 2183838712.

It is not an unprimeable number, because it can be changed into a prime (2178383813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199258 + ... + 209905.

It is an arithmetic number, because the mean of its divisors is an integer number (174713028).

Almost surely, 2^2178383812 is an apocalyptic number.

2178383812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2178383812 is a deficient number, since it is larger than the sum of its proper divisors (2014728860).

2178383812 is a wasteful number, since it uses less digits than its factorization.

2178383812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409200 (or 409176 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 2178383812 is about 46673.1594388038. The cubic root of 2178383812 is about 1296.3177479100.

The spelling of 2178383812 in words is "two billion, one hundred seventy-eight million, three hundred eighty-three thousand, eight hundred twelve".