2138079228 has 12 divisors (see below), whose sum is σ = 4988851560. Its totient is φ = 712693072.

The previous prime is 2138079227. The next prime is 2138079257. The reversal of 2138079228 is 8229708312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 2138079228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138079221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89086623 + ... + 89086646.

It is an arithmetic number, because the mean of its divisors is an integer number (415737630).

Almost surely, 2^2138079228 is an apocalyptic number.

It is an amenable number.

2138079228 is an abundant number, since it is smaller than the sum of its proper divisors (2850772332).

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

2138079228 is a wasteful number, since it uses less digits than its factorization.

2138079228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178173276 (or 178173274 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 2138079228 is about 46239.3688105709. The cubic root of 2138079228 is about 1288.2730789050.

The spelling of 2138079228 in words is "two billion, one hundred thirty-eight million, seventy-nine thousand, two hundred twenty-eight".