1138379466 has 96 divisors (see below), whose sum is σ = 2818955520. Its totient is φ = 304518144.

The previous prime is 1138379419. The next prime is 1138379467. The reversal of 1138379466 is 6649738311.

It is a happy number.

It is a super-2 number, since 2×1138379466² = 2591815617220890312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1138379467) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1194046 + ... + 1194998.

It is an arithmetic number, because the mean of its divisors is an integer number (29364120).

Almost surely, 2^1138379466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1138379466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1409477760).

1138379466 is an abundant number, since it is smaller than the sum of its proper divisors (1680576054).

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

1138379466 is a wasteful number, since it uses less digits than its factorization.

1138379466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228 (or 1221 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

The square root of 1138379466 is about 33739.8794603656. The cubic root of 1138379466 is about 1044.1486976437.

The spelling of 1138379466 in words is "one billion, one hundred thirty-eight million, three hundred seventy-nine thousand, four hundred sixty-six".