1138320396 has 72 divisors (see below), whose sum is σ = 2910542544. Its totient is φ = 375098880.

The previous prime is 1138320389. The next prime is 1138320409. The reversal of 1138320396 is 6930238311.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1138320396.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2184616 + ... + 2185136.

It is an arithmetic number, because the mean of its divisors is an integer number (40424202).

Almost surely, 2^1138320396 is an apocalyptic number.

It is an amenable number.

1138320396 is an abundant number, since it is smaller than the sum of its proper divisors (1772222148).

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

1138320396 is a wasteful number, since it uses less digits than its factorization.

1138320396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111 (or 1106 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1138320396 is about 33739.0040754021. The cubic root of 1138320396 is about 1044.1306371955.

The spelling of 1138320396 in words is "one billion, one hundred thirty-eight million, three hundred twenty thousand, three hundred ninety-six".