1157991338 has 8 divisors (see below), whose sum is σ = 1985128032. Its totient is φ = 496281996.

The previous prime is 1157991319. The next prime is 1157991353. The reversal of 1157991338 is 8331997511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1157991292 and 1157991301.

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 3 ways as a sum of consecutive naturals, for example, 41356820 + ... + 41356847.

It is an arithmetic number, because the mean of its divisors is an integer number (248141004).

Almost surely, 2^1157991338 is an apocalyptic number.

1157991338 is a deficient number, since it is larger than the sum of its proper divisors (827136694).

1157991338 is an equidigital number, since it uses as much as digits as its factorization.

1157991338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82713676.

The product of its digits is 204120, while the sum is 47.

The square root of 1157991338 is about 34029.2717818057. The cubic root of 1157991338 is about 1050.1107481069.

The spelling of 1157991338 in words is "one billion, one hundred fifty-seven million, nine hundred ninety-one thousand, three hundred thirty-eight".