1138221164 has 48 divisors (see below), whose sum is σ = 2067690240. Its totient is φ = 548009280.

The previous prime is 1138221157. The next prime is 1138221169. The reversal of 1138221164 is 4611228311.

It is not an unprimeable number, because it can be changed into a prime (1138221169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2569127 + ... + 2569569.

It is an arithmetic number, because the mean of its divisors is an integer number (43076880).

Almost surely, 2^1138221164 is an apocalyptic number.

It is an amenable number.

1138221164 is a deficient number, since it is larger than the sum of its proper divisors (929469076).

1138221164 is a wasteful number, since it uses less digits than its factorization.

1138221164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710 (or 708 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 1138221164 is about 33737.5334605243. The cubic root of 1138221164 is about 1044.1002959481.

Adding to 1138221164 its reverse (4611228311), we get a palindrome (5749449475).

The spelling of 1138221164 in words is "one billion, one hundred thirty-eight million, two hundred twenty-one thousand, one hundred sixty-four".