2178381846 has 8 divisors (see below), whose sum is σ = 4356763704. Its totient is φ = 726127280.

The previous prime is 2178381769. The next prime is 2178381847. The reversal of 2178381846 is 6481838712.

It is a sphenic number, since it is the product of 3 distinct primes.

2178381846 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 2178381795 and 2178381804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178381847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181531815 + ... + 181531826.

It is an arithmetic number, because the mean of its divisors is an integer number (544595463).

Almost surely, 2^2178381846 is an apocalyptic number.

2178381846 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2178381846 is a wasteful number, since it uses less digits than its factorization.

2178381846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363063646.

The product of its digits is 516096, while the sum is 48.

The square root of 2178381846 is about 46673.1383774436. The cubic root of 2178381846 is about 1296.3173579326.

The spelling of 2178381846 in words is "two billion, one hundred seventy-eight million, three hundred eighty-one thousand, eight hundred forty-six".