1158320385 has 16 divisors (see below), whose sum is σ = 2059236480. Its totient is φ = 617770800.

The previous prime is 1158320333. The next prime is 1158320417. The reversal of 1158320385 is 5830238511.

It is not a de Polignac number, because 1158320385 - 2¹³ = 1158312193 is a prime.

It is a super-2 number, since 2×1158320385² = 2683412228613096450, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4289941 + ... + 4290210.

It is an arithmetic number, because the mean of its divisors is an integer number (128702280).

Almost surely, 2^1158320385 is an apocalyptic number.

1158320385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1158320385 is a deficient number, since it is larger than the sum of its proper divisors (900916095).

1158320385 is an equidigital number, since it uses as much as digits as its factorization.

1158320385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8580165 (or 8580159 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 1158320385 is about 34034.1062024552. The cubic root of 1158320385 is about 1050.2102028140.

Adding to 1158320385 its reverse (5830238511), we get a palindrome (6988558896).

The spelling of 1158320385 in words is "one billion, one hundred fifty-eight million, three hundred twenty thousand, three hundred eighty-five".