2138218746 has 8 divisors (see below), whose sum is σ = 4276437504. Its totient is φ = 712739580.

The previous prime is 2138218727. The next prime is 2138218763. The reversal of 2138218746 is 6478128312.

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

2138218746 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2138218698 and 2138218707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178184890 + ... + 178184901.

It is an arithmetic number, because the mean of its divisors is an integer number (534554688).

Almost surely, 2^2138218746 is an apocalyptic number.

2138218746 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.

2138218746 is a wasteful number, since it uses less digits than its factorization.

2138218746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356369796.

The product of its digits is 129024, while the sum is 42.

The square root of 2138218746 is about 46240.8774354467. The cubic root of 2138218746 is about 1288.3010999081.

The spelling of 2138218746 in words is "two billion, one hundred thirty-eight million, two hundred eighteen thousand, seven hundred forty-six".