2178421416 has 48 divisors (see below), whose sum is σ = 5902260000. Its totient is φ = 725848992.

The previous prime is 2178421411. The next prime is 2178421417. The reversal of 2178421416 is 6141248712.

It is a happy number.

2178421416 is a `hidden beast` number, since 217 + 8 + 4 + 21 + 416 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2178421411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247605 + ... + 256251.

It is an arithmetic number, because the mean of its divisors is an integer number (122963750).

Almost surely, 2^2178421416 is an apocalyptic number.

It is an amenable number.

2178421416 is an abundant number, since it is smaller than the sum of its proper divisors (3723838584).

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

2178421416 is a wasteful number, since it uses less digits than its factorization.

2178421416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12158 (or 12151 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 2178421416 is about 46673.5622810173. The cubic root of 2178421416 is about 1296.3252070259.

The spelling of 2178421416 in words is "two billion, one hundred seventy-eight million, four hundred twenty-one thousand, four hundred sixteen".