2138819378 has 8 divisors (see below), whose sum is σ = 3214608768. Its totient is φ = 1067283124.

The previous prime is 2138819369. The next prime is 2138819401. The reversal of 2138819378 is 8739188312.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1062026 + ... + 1064037.

It is an arithmetic number, because the mean of its divisors is an integer number (401826096).

Almost surely, 2^2138819378 is an apocalyptic number.

2138819378 is a deficient number, since it is larger than the sum of its proper divisors (1075789390).

2138819378 is a wasteful number, since it uses less digits than its factorization.

2138819378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126568.

The product of its digits is 580608, while the sum is 50.

The square root of 2138819378 is about 46247.3715793665. The cubic root of 2138819378 is about 1288.4217178174.

The spelling of 2138819378 in words is "two billion, one hundred thirty-eight million, eight hundred nineteen thousand, three hundred seventy-eight".