2138822344 has 8 divisors (see below), whose sum is σ = 4010291910. Its totient is φ = 1069411168.

The previous prime is 2138822341. The next prime is 2138822351. The reversal of 2138822344 is 4432288312.

It can be written as a sum of positive squares in only one way, i.e., 2112505444 + 26316900 = 45962^2 + 5130^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2138822344² = 9149122038387308672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2138822341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133676389 + ... + 133676404.

Almost surely, 2^2138822344 is an apocalyptic number.

It is an amenable number.

2138822344 is a deficient number, since it is larger than the sum of its proper divisors (1871469566).

2138822344 is a wasteful number, since it uses less digits than its factorization.

2138822344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267352799 (or 267352795 counting only the distinct ones).

The product of its digits is 73728, while the sum is 37.

The square root of 2138822344 is about 46247.4036460427. The cubic root of 2138822344 is about 1288.4223133885.

The spelling of 2138822344 in words is "two billion, one hundred thirty-eight million, eight hundred twenty-two thousand, three hundred forty-four".