1157329538 has 4 divisors (see below), whose sum is σ = 1735994310. Its totient is φ = 578664768.

The previous prime is 1157329529. The next prime is 1157329543. The reversal of 1157329538 is 8359237511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8359237511 = 19 ⋅439959869.

It can be written as a sum of positive squares in only one way, i.e., 945132049 + 212197489 = 30743^2 + 14567^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 289332383 + ... + 289332386.

Almost surely, 2^1157329538 is an apocalyptic number.

1157329538 is a deficient number, since it is larger than the sum of its proper divisors (578664772).

1157329538 is an equidigital number, since it uses as much as digits as its factorization.

1157329538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578664771.

The product of its digits is 226800, while the sum is 44.

The square root of 1157329538 is about 34019.5464108503. The cubic root of 1157329538 is about 1049.9106614843.

The spelling of 1157329538 in words is "one billion, one hundred fifty-seven million, three hundred twenty-nine thousand, five hundred thirty-eight".